Mobile video monitoring device and wireless adapter thereof

The invention discloses a mobile video monitoring device and a wireless adapter thereof. The wireless adapter is used for accessing an improved WiFi system. The wireless adapter comprises a power supply module, a plurality of antennas, an interface module, an AP module and a network port. The AP module comprises a WiFi control module; the first end of the WiFi control module is connected with the network port, and the second end of the WiFi control module is connected to the antenna; the WiFi control module comprises a baseband processing unit; the baseband processing unit is provided with a control register for controlling the output of a baseband modulation signal; the baseband processing unit is connected with the antenna so as to receive the area attribute data frame received by the antenna and output a modification instruction to the control register based on the area attribute data frame so as to modify the value of the control register; the transmitting power of the wireless adapter can be adjusted acc