▎ 摘　　要

NOVELTY - The device (100) has graphene thin film cover portion (120) that provides graphene thin film on exposed portion surface of measurement target fluid accepted in fluid fixing unit (110). Measurement system (130) measures surface roughness of film. Current supply system (140) adds optical energy or thermal energy to target fluid accepted in holding space. Holding space receives target fluid so that portion of target fluid exposes to outside. Flake type bottom plate is adhered at lower portion of flake type top plate. Holding space is formed in inner surface of cylinder piercing globe. USE - Device for measuring physical property of fluid. ADVANTAGE - The surface information of the measurement target fluid is obtained through atomic force microscopy (AFM) after the graphene thin film is positioned at the measurement target fluid surface. The surface information of the obtained measurement target fluid is undergone an operation process. The physical property of the measurement target fluid is produced and various physical properties of the measurement target fluid are produced. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a fluid property measuring method; and (2) a fluid property measuring system. DESCRIPTION OF DRAWING(S) - The drawing shows an explanatory view of the device for measuring physical property of fluid. Device for measuring physical property of fluid (100) Fluid fixing unit (110) Graphene thin film cover portion (120) Measurement system of surface roughness (130) Current supply system (140)