Improving quality is an essential thing for a company to exist in the business competitive world. It's not time for a company to focus only on a high sales volume, but it's time for a company to focus on customer satisfaction. If the company can give customer satisfaction through their product, they will achieve maximum profit automatically. They are many method techniques to identify quality cost appeared in a company. It is very easy to control quality cost in a company if they are accounting data about it. But it will be very difficult to control the quality cost if the cost is hidden and can not be seen on accounting data. Variety techniques have been developed to solve this hidden quality cost. One of these method is Taguchi Method. By using Taguchi Method, a company will be helped to control and estimate quality cost especially hidden quality cost.