The invention discloses a wireless Bluetooth adapter. The wireless Bluetooth adapter is used for being arranged on a test instrument, connected with the test instrument through a serial port interface of the test instrument and connected with a mobile terminal through Bluetooth. The wireless Bluetooth adapter concretely comprises a power source switching circuit, a transceiver and a first signal converting circuit, wherein the power source switching circuit picks electricity through the serial port interface of the test instrument and converts power supply voltage provided by the test instrument; the transceiver sets up communication connection between the test instrument and the mobile terminal, and the transceiver comprises a Bluetooth communication unit for setting up wireless Bluetooth communication between the test instrument and the mobile terminal; the first signal converting circuit is connected with the transceiver, converts serial port signals, received by the transceiver, of the test instrument into Bluetooth signals to be transmitted, and converts the Bluetooth signals received by the transceiver into serial port signals to be transmitted to the test instrument. The wireless Bluetooth adapter enables the test instrument and the mobile terminal to be connected through Bluetooth, site test operation can be facilitated, and the work efficiency is improved.