PROBLEM TO BE SOLVED: To provide a system for detecting whereabouts of an operator by wireless communication, capable of improving accuracy of a detection result.SOLUTION: A personnel management system acquires secondary information that is information obtained on the basis of primary information and that indicates a period for which an IC tag 2 has been detected continuously by an antenna device 3, determines whether an operator who carries the IC tag 2 which has been being detected for the period has actually carried out an operation in an operation location associated with the antenna device 3 that has been detecting the IC tag 2 for the period on the basis of the length of the period that is included in the secondary information, and executes a noise removal process for excluding the operator from operation proven records in the operation location if it is determined that the operator has not actually carried out the operation.SELECTED DRAWING: Figure 10
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