Security management system and method

A security management system applied among a mobile device, a server, and an entrance guard device, the security management system comprising:

• a storage unit configured to store a restricting table, which records relationships between positional information of the mobile device and functions of a mobile phone;
• and
• at least one processor comprising:
• a barcode generating module configured to randomly generate a barcode by the entrance guard device when the mobile device is moved adjacent to the entrance guard device;
• a display module configured to display the generated barcode on the entrance guard device;
• a capturing module configured to capture the displayed barcode, and upload the captured barcode to the server by the mobile device;
• a barcode validating module configured to validate whether the uploaded barcode is the barcode randomly generated by the barcode generating module by the sever;
• an information module configured to provide positional information of the mobile device when the uploaded barcode is the barcode randomly generated by the barcode generating module;
• a restricting module configured to generate a restricting instruction according to the provided positional information of the mobile device and the restricting table stored in the storage unit;
• and
• a disabling module configured to disable the corresponding functions of the mobile device according to the generated restricting instruction.