The invention discloses a personnel information correlating method, and aims to increase the inquiring efficiency of personnel information and keep the accuracy of an inquiring result. The personnel information correlating method comprises the following specific steps: creating a personnel element information table specific to a plurality of personnel in a relational database, wherein an initial service correlation field is configured specific to the plurality of personnel during creation of the personnel element information table; creating a correlation flag bit definition table in the relational database, wherein the correlation flag bit definition table comprises a flag bit configuring rule of each service correlation field; inputting an original service data table from an external data source into the relational database; finding whether an identity card number correlated with a service exists in the personnel element information table or not; if so, updating a flag bit value for a service correlation field configured for the identity card number correlated with the service in the personnel element information table according to the flag bit configuring rule of the correlation flag bit definition table, and recording the service correlation field of which the value is updated.