The system for automatic management and depositing of documents' (images') hash in the block-chain technology comprises of at least one device for documents' recording, and/or for the conversion of documents into digital photography (1), at least one device through which communication and encoding are performed (2), at least one device through which user authentication is performed (3), at least one device on which the block-chain base is located (4) and at least one device on which the hash base is located (5). The device (1) comprises at least a digital camera, a communication system, an image processing system and the GPS, and it may additionally include an adequate software application. The communication system is a virtual VPN specifically dedicated to the device (1), and communication among the devices within the system is carried out through the Internet and it is encoded. In the device (5), the hash base is divided per tables into blocks that can be fast searched by searching the tables linked to the blocks A−1, A and A+1 first, and the hash table determines the actual address of the document in the block-chain through the hash value.