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As our country economy development and expansion, large-scale public buildings are widely used central air conditioning system, the central air conditioning system need large energy; As people living standard rise, people are more attention to the indoor environment quality. Therefore, HVAC solutions become the most key of HVAC system life cycle link. This paper uses engineering management theory and system analysis method to adjust measures to local conditions, the reasonable selection of air conditioning system, full and effective way of energy, improve the building’s efficiency of system, analyses the reasonable design to create comfortable indoor environment while as to reduce the negative influence of outdoor environment, advice for HVAC design scheme in scientific management.A set of ideal air conditioning system design scheme, besides design planning needs to perfect, the construction stage outside is also very important; Meanwhile, after completing the installation, commissioning of running and not neglect a rebalancing; Later system maintenance is the key to lasting good operating system. In recent years, people pay more and more attention to the concept of green architecture, these for air conditioning system embodied in air, air conditioning for new air distribution, air conditioning outdoor environment and air conditioning refrigerants requirements.HVAC design personnel in the design process need to combine the CFD, water pump, ice storage cold, cold air supply, electricity and gas complementary and other new technologies to satisfy the users; The design consideration system safety, reliability and flexibility and maintainability; Meanwhile the future air conditioning system without advanced intelligent control.Economical comparison is a most problem of the air conditioning schemes in the comparison consideration. In economical comparison first should pay attention must agree benchmarks for the comparison. Should use the same design requirements and application situation, equipment class, energy prices, comfortable condition, beautiful circumstance compare datum condition, so that we can guarantee scheme comparison results is scientific and reasonable. System investment including initial investment and later running costs. Our country large-scale public buildings used more big glass curtain wall, sunshade heat insulation performance is poor, the building volume rate is high, cause building cold, heat load too big, air conditioning period long wait for a reason directly to rein is serious, under the unified leadership of the ministry of construction, proposed in innovative large-scale public building energy efficiency supervision system, put forward measures for energy conservation.
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