The current research status of numerical simulations on urban meteorology and boundary layer is reviewed in this paper, including research on urban climate, urban surface energy balance, urban heat island and urban canopy modeling. Based on researchers′ experience, suggestion and discussion are given on some cutting edge problems and opinions. The state-of-art methods used in this field are discussed as well. Recommendations are also suggested in this paper: ①Observations and simulations on urban climate, urban surface energy balance, urban heat island are in great need facing the different climate zone and different cities; ②More and deeper researches on urban observation methods and rules, observation instruments and observation net design are needed; ③Prediction method of urban heat island based on synoptic conditions and urban surface characteristics should be improved; ④Computational fluid dynamic (CFD) models can be used as tools to bridge the gap between mesoscale and microscale numerical modeling, and to evaluate and improve current mesoscale urban climate simulations.