EXHAUST PURIFICATION DEVICE AND EXHAUST PURIFICATION METHOD

Provided are an exhaust purification device and an exhaust purification method which can achieve improved fuel efficiency. The exhaust purification device () is equipped with: a DOC () for occluding hydrocarbons in an exhaust gas; a DPF () that is provided downstream from the DOC () and is for trapping particulate matter in the exhaust gas; and an ECU () for determining, in accordance with the amount of occluded hydrocarbons in the DOC (), a start time for a regeneration process for removing particulate matter accumulated in the DPF ().