The invention discloses a device credential distribution method, a device credential distribution system, user equipment and a management entity. The method includes the following steps that: user equipment (UE) sends IOT device credential request information to an operator user subscription authentication management entity; the user subscription authentication management entity generates corresponding credential information according to IOT device identity information in the received credential request information, wherein the credential information contains an IMSI and an authentication keyK; after receiving the credential information, the UE sends the credential information to a corresponding IOT device; and the IOT device is attached to a mobile communication system according to the credential information. With the device credential distribution method, the device credential distribution system, the user equipment and the management entity provided by the technical schemes of thepresent invention adopted, an asymmetric key system is not required to be supported, only a symmetric key system is needed, and therefore, a device credential distribution process is simplified, and system performance can be improved.