In Now Days We Have Many Different Types Of Emergencies In The Indoor Environment. Response To Such Emergencies Is Critical In Order To Protect Resources Including Human Life And To Save Property From Damage. There Is Need To Develop Wireless Sensor Network For Temperature Controlling. In This Project, We Present Wireless Sensor Network For Temperature Controlling. Which Can Control The Temperature, This Can Use For Number Of Applications Such As Control The Temperature Of Water , Control The Temperature Of Industrial Machines, In The Industry Where Temperature Controlling Is Necessary. In Future This System Can Use For Protection From Fire, Then Obviously We Can Save Life Of People