The invention discloses a refrigerated container wireless inspection system and inspection method based on an Ad hoc network. The low power wireless communication is carried out between a signal machine and a handset. The system comprises a plurality of signal machines which collect a state parameter of a corresponding refrigerated container and transmit wireless communication signal to the outside, the handset which communicates with the signal machine to receive and view the state parameter of the corresponding refrigerated container or send a control command and receives the fed state parameter of the corresponding refrigerated container to look. Each of the signal machines comprises a serial port access plug which is connected to the data serial port of the refrigerated container to collect the state parameter of the corresponding refrigerated container, a control module which is connected to a serial port access module and is used for sending the control command to the refrigerated container, and a communication module which is connected to the control module and is used for sending the state parameter and geographical location information of the refrigerated container to the handset and receiving the control command sent by the handset. The system has the advantages of high economy and practicability, convenient disassembly and assembly, simple and convenient method, and convenient operation and easy operation.