Dietary　oil　spillage　has　become　a　widespread　and　increasing　threat　to　the　environment　worldwide.　Lipase　produced　by　bacteria　provides　an　efficient,　environment-friendly　and　cost-saving　way　to　degrade　dietary　oil　waste.　Thus,　selection　of　highly　efficient　lipases　becomes　an　urgent　need　to　solve　dietary　oil-related　environmental　issues.　In　this　study,　with　comparison　analysis　of　different　bacteria　species　showing　oil　degradation　abilities,　we　found　Bacillus　cereus　XN12　displayed　higher　dietary　oil　degradation　efficiency　than　Bacillus　subtilis　and　Enterobacter　cloacae.　Bacillus　cereus　flourishes　better　in　oil-containing　medium　than　non-oil　medium,　which　indicated　that　Bacillus　cereus　prefers　to　use　dietary　oil　as　their　energy　source.　We　then　successfully　cloned　the　lipase　gene　from　Bacillus　cereus　XN12　and　expressed　this　Bacillus　cereus　XN12　lipase　gene　in　Escherichia　coli　BL21.　The　Escherichia　coli　expressing　the　recombinant　Bacillus　cereus　lipase　protein　displayed　significant　higher　lipase　activity　and　oil　degradation　ability.　These　results　suggested　that　lipase　from　Bacillus　cereus　XN12　provides　a　potential　solution　to　alleviate　dietary　oil　pollution.