维多利亚3的所处的时代在各个领域都出现了革命性的进步，在游戏中则体现为三个独立的科技树：生产科技、军事科技以及社会科技。
三个科技树共计拥有约175项不同的科技。科技树以从上到下的顺序排列，每项科技可能都需要一个或数个前置科技，并通向一个或数个后续科技。不少国家在开局时都拥有20-30个已研发科技——取决于这些国家开局时的经济、法律、军事以及外交。通常来说，走在时代前列的国家每年都能研发出一项新科技，但并不是每个国家的科研进度都完全相同。
维多利亚3的科技系统将随着时代的发展改变并塑造游戏。尽管一些科技将会给予直接的增益，但科技的主要功能是解锁新的行动、选项——抑或是挑战。通常来说，一项新科技的研发不会对国家产生立竿见影的效果，而是为更多的玩法提供了可能性。新科技或理念的产生也将成为该国变革的催化剂，人民或许会拥抱它们，抑或是回避它们......
科技树类型
生产科技
Production technologies are all about increasing the country's economic capacity in various ways. These tend to be very concrete inventions which increases the output and/or yields in all kinds of buildings. On other occasions they may be more abstract, such as more effectively utilizing labor in the manufacturing industries. Production technologies also include advances to railways, and some even unlock goods unknown at the start of the game such as rubber, electricity, and automobiles.
军事科技
Military technologies improve the army and navy. These consist of a mix of new weapon technologies, doctrines, and ways of organizing the servicemen and officers. Some techs will establish a more reliable supply of manpower and causes fewer provinces to be lost when territory must be yielded to the enemy. The naval part of the tree is mostly dedicated to the invention of new ship types, but also includes a few new naval strategies that unlock or improve the effectiveness of certain naval orders as well as upgrades to civilian ports to improve the country's supply network and trade capacity.
社会科技
Society technologies are all about new ideas for organizing society. These include ideas pertaining to politics, finance, and diplomacy to name a few. Several political ideas in this tree also unlocks specific ideologies which may appear from that point on alongside new interest group leaders and shake up the political landscape. Just as techs in the production tree often unlock production methods, society techs often unlock laws or ideologies that can lend support for laws previously thought utterly absurd by the political establishment.
Additionally, society technologies include improvements to your country's financial system, such as central banking which increases the capacity for minting new currency and unlocks the diplomatic actions to bankroll a country or take on their debt, as well as new forms of institutions like "central archives" that unlock the secret police law/institution and leads to Identification Documents.
Eras
Eras are a rough classification of which time period a certain idea was first discovered or developed.
- Era I inventions were well-known in many parts of the world prior to 1836.
- Era II inventions are associated with the First Industrial Revolution (1836 to mid-19th century).
- Era III is a period of evolution, stabilization, and standardization that runs until late 19th century.
- Era IV corresponds with the second industrial revolution around the turn of the century.
- Era V inventions are transformative, modern ideas.
Eras act as an indicator of roughly where the country is at a given tree, but also serves a role in ensuring that rushing a certain late-game technology is difficult. Not only do technologies in later eras take more innovative effort to research, but each technology from previous eras which have not yet researched in that tree make it harder and harder to make progress. This means techs aren't unlocked on specific years, and there is never a hard block preventing players from making their universities develop technologies earlier than they were historically invented. Though it is best to keep in mind that it's a less efficient use of time and resources, so it is best to ensure that acquiring a specific technology ahead of everyone else is actually crucial for a chosen strategy, as it will not come easily.
科技扩散
Government funding and steering of national research is not the dominant way most countries are exposed to new ideas. For each of the three technology categories there is always one technology that is spreading in the country. Though the exact tech is being spread in each category is out of player's hands, it will always be something in player's current technological era which has already been invented elsewhere.
The speed by which technology spreads to the country is highly dependent on its population's literacy. In addition, any innovation being generate in excess of the literacy cap is funneled into improving technology spread rate. In other words, oversizing universities compared to the school system can assist in catching up to the rest of the world but can never be used to get ahead of the others.
Technology spread is also affected by Freedom of Speech laws. Stricter censorship provides more authority but hinders the assimilation of new knowledge throughout the country. This is often a detriment but could also very well be exactly what was intended! The downside of having a well-educated population is that they get exposed to foreign ideas more easily, and some of those ideas might not be what one had in mind. A bit more state control over what people are allowed to talk about can help keep the population focused on the ideas one may want them to know about.
Layered research
Embarking on the research of a new technology is a simple matter of clicking on the tech in the tree one would like to focus on, and time will take care of the rest. As time is perhaps the most precious resource in Victoria 3, falling behind one's neighbors could be a death sentence for their country -- or at least might force the player to cede their right to self-determination. The pace at which a research progresses is therefore of the utmost importance.
For all actual purposes and reasons, research in the game is layer based. The top most layer (innovation) is being affected by the most bottom layer (education institution).
创新力
The rate by which countries develop new technologies is measured by 
innovation. All countries start with a small amount of innovation capacity.
Countries which can afford it may construct and fund university buildings, which employ academics and clerks to boost innovation and thereby speed up the pace at which they discover new things.
Another way to improve research speed is to ensure the industrialists, armed forces, or intelligentsia are satisfied with the state of the country, as this will cause the effective cost of the tech tree associated with them to drop respectively. If only one of these groups are pleased with the society being built, this will incentivize focusing the research on that tree since it's relatively advantageous. For example, a country with a large army and laws favoring patriotic, loyalist, and jingoist ideologies would also progress faster in their military technologies, though they may fall behind on production and society technologies.
识字率
The amount of innovation which can used to actively research a chosen technology is capped by a country's 
literacy. Literacy is the percentage of the pops in the country's incorporated states that know how to read and write at any given point. For example, if the most educated people in society decide they've had enough and move abroad, its average literacy will drop, to the benefit of the other country. If a war utterly devastates the backwaters of the nation and slaughters the hundreds of thousands which were conscripted to defend it, its average literacy might increase.
This means that even if a country's universities are top-notch, its ability to effectively incorporate new learnings will be hampered by a poorly educated population. Those countries who aim to be the guiding light of global progress must maintain a solid primary school system in addition to universities that carry out their research.
受教育机会
Literacy is a product of a pop's education access. If a given pop has 30% education access, over time 30% of individuals in that pop will become literate. The pace by which this value changes is dependent on the birth- and death rate of the pop, since this sort of learning happens mostly in the early years.
A pop's wealth provides it with a base level of education access, and wealth often varies substantially depending on profession, making higher-paid professions have greater education access. However, literacy is often a limiting factor to a pop's ability to qualify for those jobs in the first place, so relying solely on wealth for education access could severely limit a country's social mobility and opportunity for economic growth.
Education institution
The main source of education access comes from the education institution, which must be established by a law and can be run by either the religious authorities, the private sector, or by a public administration depending on your school system law.
Each of these systems have their advantages:
- A religious school system keeps your priesthood strong and helps ensure unity of faith.
- A private school system works just peachy for pops with high wealth levels and ensures the working class don't get strange ideas.
- A public school system lets you enact mandatory schooling for children and encourages cultural assimilation.
参见
- To update page content see reference files in folder Victoria 3\game\common/technology/technologies:
- Each tech tree has its own
txtfile (named after the tech tree).
- Each tech tree has its own
- To update era details see reference file in folder Victoria 3\game\common/technology/era/00_eras.txt: