Data collection is most important in many industries. The data collection which refers to the collecting a data or information from respective sources. In each and every industry maintain a database with the attributes that are required and necessary. Even for health monitoring, some information about the patients is required for the further decision making or for the treatment. This collected data can be useful for the easy analysis and for the extracting data about the individuals. Here we are briefly explaining the techniques used for data collection in health monitoring systems. There are so many techniques which had been used for data collection and also it involves many kinds of research on the data collection, its security, efficiency, and so on. Data collection is very important to know the information about the individuals.