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Global warming caused by air pollution and ecosystem changes are very important. Pollutants such as harmful gases and fine dust generated in industrial sites are the main causes of air pollution. Strict control of emissions of air pollutants from industrial sites is required. In this paper, we propose a real-time air pollution index measurement platform using 5G wireless network and blockchain. The proposed platform breaks the existing passive method and collects data in real time through IoT sensor based on 5G wireless network. In order to prevent forgery and tampering of collected data, we use blockchain technology to encrypt and transmit to cloud and provide real-time air pollution index measurement platform. You can extract technology-intensive data through edge computing and cloud computing. This paper describes the architecture of the proposed platform and introduces use cases.