Waste management is a big issue in the world. Many countries provide different methods for garbage management and maintain cleanliness of surroundings. In India there is improper waste management and people also not maintain the cleanliness of environment. At many places the garbage containers are overflow but GCT(Garbage Collection Truck) not arrives. Also with increase in population of country current garbage collection system not capable to maintain the green environment. There are many kind of problems arises due to improper garbage collection like ugliness of environment, spread many diseases. There are various techniques comes out for monitoring garbage collection. In this paper we study and discuss this various techniques for garbage monitoring.