The price of water in China’s current water transfer projects is usually estimated based on the amount of project investment and the operation and management fees. However, it rarely considers the affordability of the users, unavoidably resulting in the estimates of the water’s price cannot be carried out effectively. For the purpose of estimating scientific and reasonable water supply price, AHP process of comprehensive water price assessment of water transfer projects is applied. The process not only considers meeting the supplier’s price of the project’s investment recovery and project’s normal operation, but also considers the affordability of industries and residents. It then takes account of the interests of the supply and requisitioning parties and comes up with a reasonable comprehensive water price. This article is based on the example of Dahuofang water delivery projects. The estimate of comprehensive water price in 2020 is 4.00 Yuan per cubic meters and the user’s bearing water price is 5.06 Yuan per cubic meters. Notably, the comprehensive water price is lower than the affordability of users. Therefore, in the project’s life time, the comprehensive water price not only meets the request of the fiancé and repays to the loan during project operation period, but also meet the affordability of the users.