In order to protect the intangible cultural heritage, digital technology was applied. Problems in the protection of intangible cultural heritage were analyzed. The specific measures were put forward. Based on the theory of knowledge visualization, information space, virtual reality and experience economy, the digital protection of intangible cultural heritage was studied. The related concepts of intangible cultural heritage and digital were introduced. The results showed that digital technology could protect, inherit and innovate the intangible cultural heritage. Therefore, digital technology plays an important role in the protection of intangible cultural heritage.