Environment monitoring is one of the most important application of Robotic Sensor Network (RSN) and Wireless Sensor Network (WSN). Monitoring of various factors is required for different kinds of environments. These networks have a capability of measuring different parameters such as temperature, humidity and air quality. They also process, transmit, analyze and upload the data over the internet for future use and study. It can automate the system be giving commands based on the data measured for any system to get actuated. Monitoring such parameters using sensor networks helps the humans to avoid entering hazardous areas and can help the farmers to measure required parameters on the field from a remote location. A study and comparison of applications of RSN and WSN in different environments is presented in this review paper which can help make the life of such people easy.