A method for predicting a rubber reinforcing effect of an organic-inorganic composite, comprising a step of performing thermogravimetric analysis of an organic-inorganic composite for rubber reinforcement to confirm whether the following Equation 1 is satisfied: Da ≥ 3.0 wherein, in Equation 1, Da is an area of a region where an x-axis value [temperature (°C)] is 300 to 500 °C and a y-axis value [reduction rate of weight (%/°C)] is zero or more, in a derivative thermogravimetric curve (dm/dt) obtained by thermogravimetric analysis of the organic-inorganic composite, wherein the organic-inorganic composite for rubber reinforcement comprises an inorganic filler and a coupling agent bonded to at least a part of a surface of the inorganic filler, wherein the inorganic filler is at least one particle selected from the group consisting of silica, crystalline aluminosilicate, amorphous aluminosilicate, kaolin, clay, and aluminum hydrate, and wherein the coupling agent is at least one compound selected from the group consisting of bis(3-triethoxysilylpropyl) tetrasulfide, bis(2-triethoxysilylethyl) tetrasulfide, bis(4-triethoxysilylbutyl) tetrasulfide, bis(3-trimethoxysilylpropyl) tetrasulfide, bis(2-trimethoxysilylethyl) tetrasulfide, bis(4-trimethoxysilylbutyl) tetrasulfide, bis(3-triethoxysilylpropyl) trisulfide, bis(2-triethoxysilylethyl) trisulfide, bis(4-triethoxysilylbutyl) trisulfide, bis(3-trimethoxysilylpropyl) trisulfide, bis(2-trimethoxysilylethyl) trisulfide, bis(4-trimethoxysilylbutyl) trisulfide, bis(3-triethoxysilylpropyl) disulfide, bis(2-triethoxysilylethyl) disulfide, bis(4-triethoxysilylbutyl) disulfide, bis(3-trimethoxysilylpropyl) disulfide, bis(2-trimethoxysilylethyl) disulfide, bis(4-trimethoxysilylbutyl) disulfide, 3-trimethoxysilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide, 3-triethoxysilylpropyl-N, N-dimethylthiocarbamoyltetrasulfide, 2-triethoxysilylethyl-N,N-dimethylthiocarbamoyltetrasulfide, 2-trimethoxysilylethyl-N,N-dimethylthiocarbamoyltetrasulfide, 3-trimethoxysilylpropylbenzothiazolyltetrasulfide, 3-triethoxysilylpropyl benzothiazole tetrasulfide, 3-trimethoxysilylpropyl methacrylate monosulfide, and 3-trimethoxysilylpropyl methacrylate monosulfide. performing thermogravimetric analysis of an organic-inorganic composite for rubber reinforcement to confirm whether the following Equation 1 is satisfied: Da ≥ 3.0 wherein, in Equation 1, Da is an area of a region where an x-axis value [temperature (°C)] is 300 to 500 °C and a y-axis value [reduction rate of weight (%/°C)] is zero or more, in a derivative thermogravimetric curve (dm/dt) obtained by thermogravimetric analysis of the organic-inorganic composite, wherein the organic-inorganic composite for rubber reinforcement comprises an inorganic filler and a coupling agent bonded to at least a part of a surface of the inorganic filler, wherein the inorganic filler is at least one particle selected from the group consisting of silica, crystalline aluminosilicate, amorphous aluminosilicate, kaolin, clay, and aluminum hydrate, and wherein the coupling agent is at least one compound selected from the group consisting of bis(3-triethoxysilylpropyl) tetrasulfide, bis(2-triethoxysilylethyl) tetrasulfide, bis(4-triethoxysilylbutyl) tetrasulfide, bis(3-trimethoxysilylpropyl) tetrasulfide, bis(2-trimethoxysilylethyl) tetrasulfide, bis(4-trimethoxysilylbutyl) tetrasulfide, bis(3-triethoxysilylpropyl) trisulfide, bis(2-triethoxysilylethyl) trisulfide, bis(4-triethoxysilylbutyl) trisulfide, bis(3-trimethoxysilylpropyl) trisulfide, bis(2-trimethoxysilylethyl) trisulfide, bis(4-trimethoxysilylbutyl) trisulfide, bis(3-triethoxysilylpropyl) disulfide, bis(2-triethoxysilylethyl) disulfide, bis(4-triethoxysilylbutyl) disulfide, bis(3-trimethoxysilylpropyl) disulfide, bis(2-trimethoxysilylethyl) disulfide, bis(4-trimethoxysilylbutyl) disulfide, 3-trimethoxysilylpropyl-N,N-dimethylthiocarbamoyltetrasulfide, 3-triethoxysilylpropyl-N, N-dimethylthiocarbamoyltetrasulfide, 2-triethoxysilylethyl-N,N-dimethylthiocarbamoyltetrasulfide, 2-trimethoxysilylethyl-N,N-dimethylthiocarbamoyltetrasulfide, 3-trimethoxysilylpropylbenzothiazolyltetrasulfide, 3-triethoxysilylpropyl benzothiazole tetrasulfide, 3-trimethoxysilylpropyl methacrylate monosulfide, and 3-trimethoxysilylpropyl methacrylate monosulfide.