Abstract: Proposed is a health care monitoring and smart home convergence system based on a built-in ceiling IoT radar sensor. The health care monitoring and smart home convergence system includes the built-in ceiling IoT radar sensor, and a health analysis part. The built-in ceiling IoT radar sensor is installed into a ceiling of a bedroom, and configured to measure a user's heart rate or respiratory rate on the basis of time of flight (ToF) of a radar signal to generate biosignal data. The health analysis part is configured to analyze the user's sleep pattern on the basis of the biosignal data, and uses the sleep pattern to generate health prediction information on the user's health state.