A transmission system and a transmission method for power wireless private network users under inter-station carrier aggregation are disclosed. The system comprises a macro base station, a micro base station, and a power terminal. The micro base station is used for sending bit mapping table information to the macro base station through the power terminal to limit uplink transmission of the power terminal on a wireless private network sub-frame 2 when the power service has tendency to a wireless private network, and limiting the transmission of the power terminal on a wireless public network uplink according to the acquired bit mapping table information. The macro base station is used for sending bit mapping table information to the micro base station through the power terminal to limit uplink transmission of the power terminal on a wireless public network sub-frame when the power service has tendency to a wireless public network, and limiting the transmission of the power terminal on a wireless public network uplink according to the acquired bit mapping table information. The transmission system for power wireless private network users under inter-station carrier aggregation provided by the invention can switch power service to a wireless public network or a power private network dynamically according to the network tendency of the power service.