DIESEL PARTICULATE FILTER SYSTEM

A DPF system that suppresses clogging of a DPF and enhances convenience is provided. The DPF system includes: accumulated PM quantity estimation means 6 for estimating an accumulated PM quantity in an idle state; and a long low idle forced regeneration unit 5 that if the accumulated PM quantity estimated by the accumulated PM quantity estimation means 6 exceeds a predetermined quantity, performs long low idle forced regeneration that automatically performs regeneration of a diesel particulate filter 12b, and the long low idle forced regeneration unit 5 is configured to, when a vehicle starts moving during long low idle forced regeneration, perform automatic regeneration that automatically performs regeneration of the diesel particulate filter 12b while the vehicle is moving.