Disclosed is a wireless diagnosis system power supply, which is not connected with an external power supply, and comprises a shell (1), a battery pack (2) provided within the shell, an electrical module (3) connected with the battery pack to adjust the voltage and the current, and a cable handle (4) connected with the electrical module. The power supply provides independent power supply directly without connecting with an external power network, and achieves a reasonable arrangement, a compact structure, a small size, a long service life, power saving, safety and reliability, convenience in clinical use, and high utilization rate of clinic space; and the whole system is portable and easy to install.