The Electrical Power company in Vi Xuyen Province is now coping with the rising demand from the customers and being challenged to develop due to the advancement of technology. The economic development plan of the authorities in Vi Xuyen province also pose a requirement of electric capacity to be expanded to facilitate the operation of the business as well as the citizen of the province. The company has invested a great deal of resource and finance in the point to produce the services of the best quality to its customers and at the same time optimizes the financial profits from these activities. In recent times, the managers of Electrical Power company in Vi Xuyen Province sometimes receives the complaints, un-pleasant feed-back from customer on the quality of the service such as: the electric source is not stable, the electric capacity is poor, the electric channel of wires is broken, etc... ;which is the first symptoms that the customers lack satisfaction with the service quality of the company. However, up to now there’s no research on the effect of the company service on the customer satisfaction.