The development of a realtime monitoring software for the transmission of meteorological data compatible with smart phones by using Mono for Android, ASP.NET and C# to ensure the timeliness of transmission is introduced, and the realtime monitoring of the transmission of meteorological data in a secure, timely and accurate fashion is described in terms of software requirement analysis, software architecture and implementation. It gives a detailed presentation of the main functions of the software and their optimization. The software can be used to obtain, publish, and transmit data and achieve user control with Web service. It can optimize the performance of Web service to ensure the security and efficiency of data transmission. It can also use backstage service, implicit threading, and timing warning to develop quickresponse smart phone clients and create resolutionindependent UI.