The present invention relates to an apparatus and method for detecting the remaining personnel in the bus, the bus my remaining personnel detection mode input for setting; If the detection mode is set and the start-up of the bus is turned off, by the bus disposed within the thermal sensor detects the remaining personnel and, if the remaining personnel check and transmitting the information to the control unit through the first transmission residue personnel detection Part sensor; Storing the information transmitted from the sensor unit to the storage unit remaining personnel and received via a second transceiver, and the central processing information and a predetermined time stored in the storage unit in the device after a certain period of time as compared to the information received after the lapse of the remaining If determined that the personnel presence control unit for outputting an output signal; and a drive unit for generating a beep alarm sound by the output signal of the controller; and configured to contain, the installation can be maintained simple and safety of the passengers at a low cost.
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