The invention discloses a transformer substation secondary equipment temperature collecting device. The transformer substation secondary equipment temperature collecting device comprises a single chip microcomputer, wherein the single chip microcomputer is respectively connected with a thermal resistor, a wireless charging module and a wireless ad hoc network module, the single chip microcomputer is connected with an industrial personal computer through a wireless module receiver, the industrial personal computer is connected with a cloud server, and the single chip microcomputer is further connected with a liquid crystal display and a warning circuit. Transformer substation secondary equipment status directly reflects equipment safety and health levels. Secondary equipment running temperature information can be obtained timely by using the advanced, applicable, stable and reliable temperature collecting device, so that early warning and maintenance can be performed timely when an equipment hidden danger is discovered, and accordingly an accident is prevented from occurring.