The invention provides a code number activation method, comprising the following steps of verifying a two-dimensional bar code of random code number data, wherein the two-dimensional bar code comprises an integrated circuit card identity, an international mobile subscriber identification number and a network electronic identity; importing the random code number data into an authentication networkentry code number list as first authentication data if the verification is successful; carrying out authentication according to the first authentication data in a state that an Internet of things terminal is powered on; and indicating that the code number is activated successfully if the authentication is successful. According to the code number activation method provided by the invention, a codenumber source is still controlled by an operator, and before the code number is activated and used, an operation code number resource is not consumed, so the problem that a great number of code numbers are lain idle under the condition that the circulation is relatively high is avoided.