The “Black Book” platform provides a fully intelligent blockchain social communication platform. This platform is created in a decentralized mode of blockchain, which creates a secret free space for humans find their own private space to speak freely. More and more people are worried about the deva-eye, monitoring, and although it helps humanity’s personal safety, but it has made humans have begun to think that technology has made everyone become naked and present in front of everyone. The “Black Book” has a private space, intelligent identity and confidentiality, and a multi-functional voice-changing system, which creates an absolute decentralized free, secure and intelligent social communication platform for users.