Mushroom is one of agricultural products that are in increasing demand several folds in recent years so, mushroom cultivation represents important income source for farmers and countries. This paper proposed a real time system used to monitor and control environmental parameters for mushroom cultivation. Modern module SH-1000-DTH used as sensing system to measuring environmental parameters (Temperature, Relative Humidity, and CO2 concentration). Visual basic language was used to design and implement a control program responsible for processing data from sensing system and makes a decision to operate one of the mend environment system devices according to the program stored database. The control program was designed to make the system work either automatically or manually to give the user more flexibility in his work and also designed in away makes dealing with it easy and simple. Results obtained when this system tested show increasing in production about 46% and increasing in product quality when compared with the traditional production without using this system.