The invention provides a power planning scheme determination method and device based on a business index, which are high in economy. The method comprises the steps of: obtaining a reference cycle index sequence and an index-to-be-judged sequence, and determining a time difference-to-be-judged sequence according to the index-to-be-judged sequence and preset time difference period numbers; carrying out standardization respectively on the reference cycle index sequence and the time difference-to-be-judged sequence, and obtaining a standard cycle index sequence and a standard time difference index sequence; according to the standard cycle index sequence and the standard time difference index sequence, determining association coefficients of the index-to-be-judged sequence and the standard cycle index sequence; determining grey relational degrees according to the association coefficients, and determining the preset time difference period number corresponding to the maximum grey relational degree as a time difference-to-be-judged period number; and according to the time difference-to-be-judged period number, determining the advanced hysteresis performance of the index corresponding to the index-to-be-judged sequence, and determining the power planning scheme according to the advanced hysteresis performance.