An electronic component mounting system includes plural mounting line systems, and an integrated system capable of communication with the plural mounting line systems. The mounting line systems have an electronic component mounting line, a mounting line management unit, and an identification information reading unit. If identification information read by the identification information reading unit is not stored in an integrated database, a component information reading unit included in the mounting line management unit reads from a local database the identification information and information about a use status of electronic components housed in an electronic component housing body to which the identification information is attached.