A method for preparing an ultraviolet (UV)-degradable and functionalized cellulose paper-based colorimetric sensor, in which a TiO.sub.2-loaded cellulose filter paper is prepared, from which a TiO.sub.2/OTS-loaded functionalized cellulose filter paper is prepared; and the TiO.sub.2/OTS-loaded functionalized cellulose filter paper is combined with colorimetric materials to obtain the UV-degradable and functionalized cellulose paper-based colorimetric sensor with multiple hydrophilic dye-loading regions and a hydrophobic isolation region. This application further provides a food quality evaluation method, in which a food quality evaluation model is established based on the UV-degradable and functionalized cellulose paper-based colorimetric sensor.

A method for preparing an ultraviolet (UV)-degradable and functionalized cellulose paper-based colorimetric sensor, in which a TiO.sub.2-loaded cellulose filter paper is prepared, from which a TiO.sub.2/OTS-loaded functionalized cellulose filter paper is prepared; and the TiO.sub.2/OTS-loaded functionalized cellulose filter paper is combined with colorimetric materials to obtain the UV-degradable and functionalized cellulose paper-based colorimetric sensor with multiple hydrophilic dye-loading regions and a hydrophobic isolation region. This application further provides a food quality evaluation method, in which a food quality evaluation model is established based on the UV-degradable and functionalized cellulose paper-based colorimetric sensor.