Economical housing policy is an effective measure to solve the housing problem of low and medium-income households in China, and plays an important role in the residential industry. But there still exist some problems in the course of implementing the economical housing policy. Considering commodity character and social security function of economical houses, this paper illustrates the theory foundation of policy planning; provides the proposals for the pattern of economical houses system on the basis of market economy mechanisms.

This paper first points out the basic characteristics of default payment in construction field at present, then puts forward detailed countermeasures from five aspects, which consist of speeding up to establish the social credit system, strengthening market management and supervision, establishing construction risk management system, reforming investment and financing system of government’s projects, broadening financing channels of real estate development projects.

Energy conservation strategy aimed at improving energy efficiency and reducing green house gases emission play a key role on sustainable development. Because the proportion of building energy consumption to total energy consumption is very high, construct energy conservation buildings become the main task in executing energy conservation strategy. The decision-making among relative participants is a dynamic game course. Based on game theory, this paper analyzes the different choices between governments and real estate developers. The results show that at the primary stage of building energy conservation, the governments should provide policy support to the enterprises in order to accelerate the implement of building energy conservation strategy; at the mature stage of building energy conservation, the governments should cancel market intervention and the developers could voluntarily construct the energy conservation buildings under economic profit drive.

With the economical development and improvement of people’s life level in China, building energy consumption rises rapidly. So building energy efficiency plays an important role in Chinese energy efficiency strategy. Among which public building efficiency is more important than other parts. Present the status quo of public building energy efficiency and government procurement. Discuss the crucial instruction and demonstration effects of government energy efficiency on public building energy efficiency by use of Keynesian multiplier. Synchronously consider government energy efficient procurement is one of the methods to innovate the public building energy efficiency mechanism. The government energy efficient procurement encourages the production and distribution of energy efficiency equipment and engineering. On the meantime, the goals of reducing public building energy consumption and improving the quality of indoor environment could be achieved as soon as quickly.

Computers has been used in Chinese construction industry since 1980′s, although 95% design firms have applied 2D CAD, and compared with IT in AEC (architecture, engineer and contractor) in USA and UK, Chinese construction IT developed very slowly. What are the reasons and how to resolve it? By questionnaire surveys and interviewing directors, IT managers, officials, consumers and scholars from Chinese construction industry, the author applied qualitative approach and deductive analysis to find the key factors which influence the development of Chinese construction IT. The author concluded related research in the field and give recommendations on how to stimulate the adoption and development of IT in the Chinese construction industry from three main bodies of construction IT, which includes the R & D (research and development)enterprises in construction IT, AEC enterprises, the government and industry levels.