A system for remotely controlling cameras includes an application server (3), a database (5), and a plurality of client computers (1). The application server includes: a connecting module (31) for connecting a corresponding camera to the application server; a camera controlling module (32) for controlling and adjusting the cameras to obtain clearer signals; a video signal collecting module (33) for collecting video signals; a video signal compiling module (34) for compiling the video signals into video data that can be viewed by users; and a data transmitting module (35) for transmitting the video data to the client computers. A related method for remotely controlling cameras is also disclosed.