The invention discloses a wifi transmitting device used for measuring signals of a wind tower in real time. The device comprises an anemograph, an anemoscope, a thermometer, a barometer, a data acquisition unit, a storage battery, a solar panel, a first wireless AP (access point), a second wireless AP and a serial server, wherein data measured by the anemograph, the anemoscope, the thermometer and the barometer are acquired by the data acquisition unit and then transmitted to the serial server through a local communication serial port of the data acquisition unit, the serial server converts the acquired signals and then transmits the signals to the first wireless AP which transmits the signals to the second wireless AP through a wifi signal, the second wireless AP transmits the acquired signals to a central server, the storage battery supplies a direct current supply to a transmission device, and the solar panel charges for the storage battery. The wifi transmitting device has the advantages of being capable of transmitting the acquired signals of the wind power to the central server in real time.