The present invention relates to a data buffer apparatus with wireless transmission function, including a transmission interface module, a memory module, a wireless transmission module and a microprocessor module. The transmission interface module is coupled to a monitoring unit and continuously receives at least one transmission signal data to be stored in the memory module. When the memory module has the transmission signal data, the microprocessor module controls the wireless transmission module to attempts to establish a wireless connection. If the wireless connection is successfully established, the transmission signal data will be sent. If the wireless connection can not be established, it will attempt to establish the wireless connection again after a period of time.
