Find the monitor installed in the room. Some people say thermal imaging. Is there any other good way to find surveillance?

First, it is naked eye observation. First of all, see if there are decorations, pendants and other items in the room. Now many mini cameras can be installed on flowers, trinkets, televisions, wall socket air conditioners, desks, ceilings, chandeliers and other items, and carefully check whether these things have abnormal holes and the like;

Second, use a mobile phone camera, especially one with infrared. You can turn off all the lights in the room first, turn on the camera of your mobile phone, and then check all the hidden places to see if there is light. Generally, there are red dots in the room and in any furnishings, that is, there are monitoring equipment. Now there are also machines that sell special testing equipment. You can buy one if you have money.