With the advancement of Internet technology, the Internet is no longer just a carrier for humans to receive and transmit information, but also to achieve a close connection between people and things, and things and things. Based on the current situation of Sino-Japanese cultural exchanges, this article attempts to explore new paths for cultural exchanges in a smart environment. This article uses smart sensor technology to build an intelligent cultural exchange platform model, which provides an online cultural exchange platform for people who love Chinese and Japanese cultures. Users can upload their cultural insights to the platform through the Internet, and the smart sensors in the platform will analyze the content in combination with smart algorithms, filter out the content containing sensitive words, and leave only valuable cultural exchange information. In addition, smart sensors can also analyze all the data in the platform and make intelligent decisions to better meet the demands and expectations of target users in the process of cultural exchanges. According to the platform data, 34.77% of users have posted cultural-related knowledge issues on the platform for help. In contrast, although the content of cultural events only accounts for 7.38%, they can promote the connection of online and offline cultural exchange activities, and better promote various offline cultural activities through online platforms.