Abstract: Abstract: This paper is meant to analyze the merits and demerits of the two ways in which Party B voluntarily purchases all the tangible materials and Party A supplies all the materials. It argues that the latter really plays a very positive role in inhibiting the chain debts, improving project quality, and enhancing the promotion of the bulding material industry. The paper discusses such defects as the separation of the technology and the economics in the existing valuation model, the separation of the profit range and conduct, and the inappropriate price reflection of the project’s actual value, and it also makes bold exploration of the valuation model based on Party A’s supply of all the tangible materials, proposing an increase of the administrative expense weight, a close relation of the profit range to the actual administrative level, and an addition of Billing module of the “technical assistance expense”. By adjusting the valuation conponents in building work, this paper aims at leading the enterprises to pay more attention to administration, to actively apply the new technologies, to gradually improve the overall level of the building industry, and to finally advance the promotion of the building material industry.

Key words: Pary A’s supply of materials, valuation model, analysis and exloration, promotion of industry