The visual multifunctional detector integrates infrared temperature measurement, wind speed measurement, infrared thermal imaging, visible light imaging, infrared ranging, leakage detection, toxic gas detection and other sensors in one, with a variety of functions. At the same time, the multifunctional detector for fire protection has 4G full netcom, dual-band WIFI, Bluetooth wireless communication functions, and supports Beidou and GPS satellite positioning. The visual multi-functional detector can transmit the collected data to the command center in real time, and the on-site environmental data and images can assist the commander in directing the fire fighting, giving instructions in time, and improving the efficiency of fire rescue.