The embodiment of the invention discloses a network blockage based labeling method, device and system. A labeling implementation scheme in the existing spliced wall display is that labeling points are transmitted to a server and then fed back to a client after being drawn by a labeling server, and the client then sends a next group of the labeling points after receiving a service feedback, so that the technical problems of extremely slow response and very poor user experience are resulted under the circumstances of network blockage. The network blockage based labeling method, device and system are disclosed to solve the technical problems. According to the embodiment, the network blockage based labeling method comprises the steps of, by a client, obtaining a preview image which is without any label and turned back by the labeling server; and sending labeling notes to a labeling server and performing self-drawing operation of each labeling point by the client.