The rapid development of information technology (IT) has impacted the competitive environment between properties. Today, more and more companies introduce information system to flow internal messages freely, reduce the communication cost and provide support the important messages to managers for fast decision. By this way, the enterprise could maintain its competitive advantage. To introduce the information system¡]IS¡^ is really costly, companies should probe the effects before and after the investment of IS . We have learned from literatures that measurement of service quality is the proper means to gauge the information system. This study is to assess information system at the base of ¡uIS-adapted SERVQUAL instrument¡v and ¡uThree-column format¡v. A survey, which adapted to individual company, was conducted with some measures modified from the viewpoint of captioned company. 436 valid samples were taken from more than 8600 employees by stratified random sampling. The major findings are (1) instead of four dimensions expected from the original model, only two service components, attitude perspective and skill perspective, are identified in the service quality of information system for manufacturing industry,¡]2¡^the difference between ¡¥perceive quality¡¦ and ¡¥self-confident quality¡¦ is significant, ¡]3¡^Following the demographic variables among ages, positions, working departments and academic degrees, it appears no significant difference in the attitude perspective and skill perspective of service quality concerning information system.