To solve problems that an image is difficult to be confirmed before replacing or attaching a component actually in component replacing work for a product in the prior art, and that selling ability and working effect are affected by knowledge of a skilled sales person and a skilled worker.

This service system of the present invention is provided with a product information storing part for storing product information of a product constituted of the plural components, a component information storing part for storing component information for the components constituting the product and components for replacement and attachment, a know-how information storing part for storing at least one information out of customer service information, work information and information concerned in the components, and a supporting tool for generating support information for reading the customer service information, the work information and the information concerned in the components stored in the know-how information storing part to support sales work and assembling work, using the component information or the product information, thereby unifies the sales and assembling works. An image display part is provided to provide the image after the component is replaced or attached.