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With the speeding up of urbanization and growth of national economy, housing industry has developed rapidly in recent years, the residential building energy saving problem has been increasingly outstanding, according to the study, the future China building energy consumption ratio will rise to about 35%. At present, building energy conservation has become one of the recognized effective ways to solve the increasingly serious energy problems. Through the study of the near zero energy building in the hot summer and cold winter area，the thermal comfort of the near zero energy building was satisfied by using the semiconductor cold and hot wall system，the practical effect and operation parameters of the semiconductor cooling wall were given. It was presents a series of Suggestions and improvement Suggestions for the research and energy conservation work of near zero energy buildings in hot summer and cold winter area.

Phytoremediation and soil washing are both potentially useful for remediating arsenic (As)-contaminated soils. We evaluated the effectiveness of a combined process coupling phytoremediation and in situ soil flushing for removal of As in contaminated soil through a pilot study. The results showed that growing Pteris vittata L. (P.v.) accompanied by soil flushing of phosphate (P.v./Flushing treatment) could significantly decrease the total As concentration of soil over a 37 day flushing period compared with the single flushing (Flushing treatment). The P.v./Flushing treatment removed 54.04% of soil As from contaminated soil compared to 47.16% in Flushing treatment, suggesting that the growth of P. vittata was beneficial for promoting the removal efficiency. We analyzed the As fractionation in soil and As concentration in soil solution to reveal the mechanism behind this combined process. Results showed that comparing with the control treatment, the percent of labile arsenate fraction significantly increased by 17% under P.v./Flushing treatment. As concentration in soil solution remained a high lever during the middle and later periods (51.26–56.22 mg/L), which was significantly higher than the Flushing treatment. Although soil flushing of phosphate for more than a month, P. vittata still had good accumulation and transfer capacity of As of the soil. The results of the research revealed that combination of phytoremediation and in situ soil flushing is available to remediate As-contaminated soils.