Data processing method and system for describing evolution process of power system

The invention discloses a data processing method and system for describing the evolution process of a power system, and the method comprises the steps: building a set table which comprises a primary key; the set table comprises a case set table and an element set table; wherein the case set table is associated with an element set table through a primary key, and elements corresponding to cases in the case set table are determined; establishing an information table, wherein the information table comprises a primary key; the information table is associated with the set table through a primary key; the data record of the information table comprises time fields, elements and attribute information; when the attribute information of the elements changes, judging whether a data record is added to the information table according to a preset update judgment rule; determining a target case in the case set table, and searching elements in an element set table associated with the target case through a primary key of the