The invention discloses a method and system for uploading machine service data of a machine type communication (MTC) system. In the method, network side equipment sends an unidirectional non-response singling to a specified machine terminal; and the machine terminal which receives the unidirectional non-response singling is in no need of carrying out uplink response on the unidirectional non-response singling and establishing a radio resource control (RRC) connection, and directly uploads machine service data to the network side equipment by public radio bearing resources. According to the invention, the machine terminal can carry out interaction of signaling information as less as possible when the machine service data are uploaded, thus maximizing the use ratio of the radio resources and ensuring the electricity-saving requirement of the machine terminal.