The present invention discloses a socket with power supply, comprising a housing having a upper cover and a lower cover which are connected together to form a receiving space; a transformer connected with an alternate current source through a plug protruding out of the first opening; at least a socket capable of outputting the alternate current; a rectifying circuit capable of rectifying the alternate current to direct current; and an output power plug coupled with the rectifying circuit and protruding out of the second opening through a power cord to output the direct current to an electronic device.