The invention discloses a marine fire danger monitoring device with a Beidou system. The marine fire danger monitoring device comprises a shell, a central controller and a GPS device, a temperature sensor and an alarm apparatus are arranged at the rear end of the shell, a smoke detector and a supporting shaft are installed on the bottom of the shell, and a camera lens is arranged at the front end of the shell. The temperature sensor and the smoke detector are connected with the central controller through internal wires, a fixing foot support is movably connected with the lower portion of the supporting shaft through a rotary shaft, a storage module is arranged in the central controller, the output end of the central controller are connected with a ZIGBE module, a circuit board and an infrared detector through data transmission lines separately, the circuit board is connected with a broadcasting device through an internal wire, and the GPS device is installed at the rear end of the shell and connected with the central controller through a data transmission line. By means of the marine fire danger monitoring device, fire danger detection is more precise, the loss caused by false fire alarming can be avoided, meanwhile, the GPS positioning function and the data uploading function are achieved, the time for rescue is saved, and convenience is brought to the development of detection and maintenance work.