An engine system having an exhaust gas recirculation (EGR) apparatus includes: an engine including a plurality of combustion chambers; an intake line through which an intake gas supplied to the combustion chambers flows; an exhaust line in which an exhaust gas discharged from the combustion chambers flows; and a turbocharger including: a turbine disposed at the exhaust line and rotating by the exhaust gas; and a compressor disposed in the intake line and rotating and compressing external air. The EGR apparatus includes a recirculation line branched from the exhaust line; an EGR valve disposed at the recirculation line and adjusting a recirculation gas amount; a pressure sensor disposed at a front end of the EGR valve to measure a pressure of a recirculation gas; and a flow rate adjustment apparatus disposed at a rear end of the EGR valve and adjusting the recirculation gas amount.