Can I go to the criminal investigation department of the police station to study criminal psychology?

Actually, I don't quite understand the meaning of the investigation team. Generally speaking, public security bureaus in China are divided into public security brigade (that is, police station) and criminal investigation department (responsible for handling criminal cases), as well as some special departments.

Then I'll take the criminal investigation department = criminal investigation team to answer it for you. At present, the domestic criminal investigation brigade is recruited by civil servants and some temporary workers outside the establishment. Reading criminal psychology should be the relevant department of civil servants, that is, the positions that you can apply for in the national examination.

Let me add that the criminal investigation department may be different from the plot of solving a big case in a TV series. Most of my daily work is watching surveillance videos. If you encounter a major case, you have to work overtime to finish it quickly. Of course, there are also many trivial criminal cases (such as stealing motorcycles). It's really hard to say, because I'm not an insider. If the subject is interested in doing public security, you may wish to go online to see the consultation of the national examination.