In order to meet the real-time, interactive and personalized needs to the denitrification electricity price monitor work, a mobile platform has been established based on mobile technology such as PhoneGap, HTML5 and SQLite. The platform has realized mobile monitoring and decision making for the full process of coal-fired unit deNOX on mobile intelligent terminal, expanded the service scene to the on-site, and made the data spread from monitoring system to mobile users more rapidly based on the information subscription and broadcast mechanism. The mobile platform has achieved the all-weather and unlimited monitoring to the denitrification electricity price monitor work in a lower cost and more effective way. It is a powerful promotion and extension to current online monitoring system and has developed conventional supervising service mode and made it more comprehensive and diversification.