Uninterruptible power supply system

The utility model relates to the technical field of uninterruptible power supply, and discloses an uninterruptible power supply system, which comprises a device main body, a groove chamber I and a groove chamber II are arranged on two sides of the upper end in the device main body, and a main power supply and a standby power supply are arranged in the groove chamber I and the groove chamber II. According to the uninterruptible power supply system, when the power supply of the main power supply is abnormal, the first voltage and current detection module detects that the power supply of the main power supply is abnormal, and the circuit control module controls the circuit driving module to disconnect the first bidirectional switch control module and the first auxiliary circuit module; meanwhile, the circuit control module controls the circuit driving module to be connected with the second auxiliary circuit module and the second bidirectional switch control module, so that the standby power supply supplies power