Abstract: A search system including: a data management unit for collecting raw cost data including information on a usage amount of the time unit for cloud service resources, a usage log, and cost thereby provided from the cloud service to extract each item of billing history included the raw cost data as an item, setting the item as a search key for cost search, and classifying the cost into each item of the billing history to generate cost data; a cost data unit for storing the cost data; a cost search application for providing an interface for cost search; a filtering unit for setting the search key for each item for cost search, and filtering the result searched from the cost data unit; and a search unit for generating a cost report based on the cost data included in the filtered searched result.