The research purpose of architectural and environmental acoustics is to maintain a pleasant acoustic environment for human habitation and show solicitude for the auditory perception of human beings,so that they can enjoy music and other pleasant sound and shield off or reduce the disturbance of noise and vibration. A good acoustic living environment is an important precondition for ensuring human health and improving productivity and working efficiency as well as for benefiting thinking and study. This paper systematically introduces the research area,content and situation of architectural and environmental acoustics and its three main branches,namely,auditorium acoustics,noise control and soundscape,and presents some frontiers and hot points which must be noticed in the field of architectural and environmental acoustics. Meanwhile,some important research works completed by the authors and their team in this field are also described.