System for determining a greenhouse effect gas emission index

The invention presents a greenhouse effect gas emission index converting system (2) for converting the emission index (M) of greenhouse effect gas (G) on the basis of input information by using a specified conversion formula (10a, 10b, ...), and calculating the emission index (M) of greenhouse effect gas more correctly and fairly in order to trade the emissions rights of greenhouse effect gas at high reliability. The greenhouse effect gas emission index converting system (2) of the present invention includes a data input unit (8) for entering various data for calculating the index emission (M) of greenhouse effect gas, an information input unit (9) for incorporating the conversion information (10a, 10b, ...) for calculating the emission index (M) of greenhouse effect gas by using various data, an operation processing unit (2, 10) for calculating the emission index (M) of greenhouse effect gas by calculating various data according to the conversion information (10a, 10b, ...) , and an information output unit (11) for issuing the calculated emission index (M).