An internet of things (IoT) stream data quality indicator and profiling method and a system therefor are provided. The method for measuring IoT stream data quality includes receiving stream data generated from at least one or more IoT equipment sensors, calculating quality indicators being preset for the received stream data, and measuring quality for the stream data of the IoT equipment sensor based on the calculated quality indicators. The quality indicators include a single signal quality indicator (SSQI) which is a quality indicator for single stream data and a multiple signals quality indicator (MSQI) which is a quality indicator for a relationship between several stream datasets.