A portable container inventory control system uses RFID technology for automatically monitoring the taking and returning operations of items such as, but not limited to, tools, weapons, jewelry, surgical instruments, from one or more receptacles inside a portable container to maintain a status of each item as well as an operational record of each item. Furthermore, the system may register which item has been taken from or stored from which receptacle by which worker and when it was taken and returned, and compile the information of all storage locations in one database and system for administering, reporting and sending alarms in order to have total item control, accountability, item service control (maintenance, calibration, repairs, and/or replacement), and administration of usage for the items controlled by the system.