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The development of Internet and communications technology have brought great influence on people in every area and changed people's lifestyle since the 21st century. With the accelerating pace of urban construction, technological innovation, a gradual increase in the level of economic development, intelligent building become a comprehensive reflection of the level of science and technology economy countries, regions, and even cities as a result of technological innovation. It has become an important pillar of the development of the construction industry. It is not only the new lifeblood of economic development, but the lifeblood of human beings sustainable development. Intelligent building provide people with a comfortable, universities, secure and convenient environment. This paper described the concept of intelligent building equipment management information system as well as its history firstly, then discussed the major equipment management information system of intelligent building, finally, researched on integrated development of intelligent building equipment management information management system, and made a wonderful prospect of the future of the development of intelligent buildings.

Sigma-delta modulation is playing a more and more important role in fractional-N PLL synthesizer. MASH structure is prevailing in fractional-N PLLs because of its intrinsic stability. 2nd and 3rd order MASH modulators have been reported in fractional-N systems, but little about higher order sigma-delta modulators. In this article, a new optimized algorithm is developed; base on this general algorithm MASH modulator with arbitrary high order can be implemented with more flexibility and less hardware effort. This structure is very easy to be integrated into embedded systems, and also can be extended to be use in coding and oversample DAC/ADC systems. Both mathematic analysis and simulation are presented.