- Advances in computer technology is growing very fast and has an important role as a center of data and informationsystems to assist the transactional Luna Petshop and controlling inventory. Constraints of Luna Petshop that can not determine the amount of sales of goods in the next period, resulting in inhibition of the sales transaction for out of stock items. Inventory control information system uses Triple Exponential Smoothing method is the solution to forecast sales and provide recommendations on supplier purchases in the months ahead by analyzing historical sales data for previous periods. This information system also may provide statistical information regarding the sale and purchase of every month, if the sale or purchase of an increase or decrease