The invention provides an information management technology which evaluates environmental load information of a product. A system comprises a parts construction database which stores parts numbers, type information and relation information thereof, an environmental load information database which stores environmental load information of the parts, an evaluation rule storage unit which stores an evaluation rule of the environmental load, an evaluation processing unit which extracts the environmental load information of type number information associated with one parts number and judges whether or not corresponding type number information can be an evaluation object type number of the environmental load, a parts totalization processing unit which extracts the environmental load information, totalizes the environmental load information for each master parts or for each product and generates total information of the environmental load information, and an output processing unit which outputs total information.