It　has　been　found　that　the　metallic　nanomaterials　with　mimetic　enzyme　activity　have　multiple　oxidoreductase-like　enzyme　activities,　such　as　horseradish　peroxidase,　glutathione　peroxidase,　catalase,　oxidase,　glucose　oxidase,　etc.　In　recent　years,　many　applied　researches　based　on　these　nanozymes　have　been　reported.　This　review　summarizes　three　kinds　of　representative　nanozymes,　including　metal　nanomaterials,　MOFs,　metal　oxide　nanomaterials,　and　their　corresponding　applications　in　sensing　and　biosensing.