A printing apparatus management system includes: a printing apparatus which includes an IC tag performing wireless communication with the outside and a memory being connected to the IC tag; and a first information terminal which has at least a function of writing information in the memory through wireless communication with the IC tag. The first information terminal maintains authentication data used by the printing apparatus, writes the authentication data in the memory, and transmits the authentication data to another information terminal. In addition, the printing apparatus interrupts a predetermined function, when the authentication data is written by the first information terminal, and in a state where authentication data is written in the memory by the first information terminal or an information terminal other than the first information terminal in the interruption state, the printing apparatus makes the predetermined function effective, when the authentication data written by the first information terminal before the interruption state and the authentication data written by the first information terminal or the information terminal other than the first information terminal after the interruption state accord with each other.