Abstract: In order to mitigate the energy consumption balance problem in wireless network transmission,a novel depicted algorithm ECBC (Energy Consumption Balance based on Cloud theory) is proposed based on cloud theory.In this algorithm,the evaluation index is defined by node remainder energy and data effective transmission distance at first,which is calculated with cloud theory.Then,a simulation was conducted to study the key factor of this algorithm with OPENT.The result shows that,compared to other algorithm,it has good suitability.