The service design we designed informs users of the trend of carbon generation in their daily life through life patterns and consumption patterns, and introduces ways to improve them. Therefore, citizens will gradually increase their knowledge of low-carbon activities and will be able to implement them with will. These user behaviors can lead to active campaigns on eco-friendly products, funding, and low-carbon movements, and as these movements gradually increase, companies that were indifferent to the existing environment also feel a sense of crisis and not only eco-friendly business activities, but also Consideration will be given to environmental campaigns affiliated with the app. In addition, an eco-friendly company can promote an eco-friendly company image and products to users. By addressing citizens' desire for low-carbon and environmental protection, which is rapidly rising recently, and by informing consumers of how much carbon is consumed in business activities and products, the service that demands low-carbon movement from companies is also a service that requires eco-friendly people and people. They will be able to help the city they are building. In addition, we created a low-carbon stance for people who have difficulty using the app, thereby encouraging people of all ages to take an interest in carbon issues and pass it on to future generations.