The IOT-based building energy consumption management system, as an important technology management means for energy efficiency, is prevalent and applied widely. Nevertheless, the requirement of occupant comfort environment is rarely considered in most previous studies. In this paper, based on intelligent sensing technology, we put forward a novel system framework for building energy consumption management systems, which focuses on providing the comfort environment for occupants in energy saving. Firstly, the energy efficiency sensing and control unit is developed, which consists of several sensors for environment comfort evaluation and data fusion. In addition, the feedback control is realized in this unit through multi-sensor integration and GPIO ports. The concept of collaborating with people, machine and substance is reflected in the working process of this unit. Secondly, the relation between environment factors and energy consumption control is clearly described with the event-based ECA-rules. The real-time response to environment sensing and energy consumption data streams is achieved by utilizing complex event processing. Finally, the application scenarios show the benefits of the proposed system architecture.