The invention relates to the field of camera protection systems, and particularly discloses an Internet-based security protection system. The Internet-based security protection system comprises a power supply, a wireless router, a mobile phone, a computer, a camera and a main board for controlling the camera; the camera comprises a box body, a protection cover, a support, a buckling assembly, a control module and an alarm module; and the alarm module comprises a temperature sensor, a second iron block and a WIFI module, wherein the second iron block is slidably connected with a sliding groove,the temperature sensor is fixedly connected with the second iron block, the output end of the temperature sensor is electrically connected with the third input end of a single chip microcomputer, andthe third output end of a controller is electrically connected with the input end of the WIFI module. By adopting the technical scheme, hacker intrusion can be prevented by means of cooperation of software and physical control.