The present invention discloses a transformer substation communication terminal uninterupted alternating current and direct current (AC/DC) power supply system. The system is characterized in that the system comprises a commercial power socket (1); the commercial power socket (1) is connected with a rectifier module (5); the rectifier module (5) is individually connected with a dispatching IP telephone (4), a bi-directional power converter (6) and an inverter (9); the bi-directional power converter (6) is connected with a function switch (7); the function switch (7) is connected with a lithium battery pack (8); and the inverter (9) is connected with an information terminal (2). The system provided by the present invention is multi-functional integral-type equipment, can provide both direct current and alternating current, and is small in size, long in service life, safe, stable and reliable.