In recent days, people are easily affected by chronic diseases like heart attack, respiratory problems, mind stroke etc. Henceforth, it is very essential for common people to undergo health check-ups to avoid any unanticipated health conditions. Since people are busy in their work, they tend to have all the services at the tip of their fingers. IoT healthcare monitoring system is one such smart and efficient technologies, which makes the human life more simple and easy. In this way, the smart healthcare monitoring technologies utilizes several sensors that can monitor the patient’s daily health-related activities, collect the data from the sensors, store the data and further transmit the data to doctors, care takers or nurses through internet. In this paper, different smart healthcare monitoring technologies are reviewed. This paper presents how different approaches are developed to monitor the basic health activities or vital signs in the patients.