Abstract: Convective Cloud Merger is a common phenomenon during severely convective weather events such as storm, strong wind, hail and thunder. The merger of convective clouds play an important role in cloud' s developing; more precipitation and severe storm weather events often occur after clouds are merged. This paper presents a review of convective cloud merger including observation of cloud merger, concept of merger, the influence of precipitation, and the theory. Finally, future research on cloud merging has been discussed. The application of new monitoring data with higher spatiotemporal resolution and additional physical parameters will be a mainly research area of Convective Cloud Merger. In addition, the study of physical processes with high spatiotemporal numerical models will be another interesting research area.