The Temperature and Humidity plays an important role in keeping our environment stable and balance. So by knowing the values of these parameters, it’d be helpful to study the different aspects of environmental factors like weather forecast, productivity of crops, research industries etc. Therefore, there’s a requirement of the smart system which is fully digital, automated, accurate and capable enough to observe all the environmental parameters with utmost possible accuracy. Besides, it should be cost-effective and portable too. This research work represents the  wired system reduce to wireless system using DHT-11 Sensor, Arduino UNO, HC-05 Bluetooth module, a mobile device and 16x2 Liquid Crystal Display (LCD). The DHT-11 Sensor sensing the data of Temperature and Humidity and transmission of its data using Arduino UNO and HC-05 Bluetooth Module. The mobile device receives the data using Arduino UNO, HC-05 Bluetooth Module and displays it on LCD too.