Abstract: In order to improve the information intercommunication of water resources systems and theonline monitoring capacity of water balance,an intelligent monitoring system for water balance was de-signed in Balasu Coal Mine,combining the principle of water balance with the Internet of Things,BigData,and cloud platform technology. Based on the water intake,water use,drainage and water treatmentsystems,considering the business needs of online water balance analysis,a two-level water balance mo-nitoring system was adopted to build the water resource information monitoring network covering thewhole mining area. The water balance intelligent monitoring platform composed of the acquisition,trans-mission and application layers was constructed using the layered architecture. The hardware design andsoftware design of the system were described. The system could realize the functions such as online mo-nitoring,dynamic analysis,prediction and early warning,report statistics,and visual management of coalmine water balance,so as to improve the management level of comprehensive utilization of coal minewater resources. Close-