A platform server includes at least one memory configured to store instructions for performing a predetermined operation, and at least one processor operatively connected to the memory and configured to execute the instructions. The at least one processor is configured to store data in which carbon emissions are defined for each manufacturing weight of bicycle parts made of a predetermined material, acquire an image of a bicycle, determine parts included in the image, determine carbon emissions according to manufacturing of the bicycle by comparing information on the determined parts with the defined data, and provide mileage to a subject related to an event based on the determined carbon emissions when the event related to the bicycle corresponding to the image occurs.