The invention discloses a method for completing drawing of a certain theme and saving works by two persons. The method comprises the following steps of: setting a boundary and a size according to a theme, and initializing a first user exclusive drawing area and a second user exclusive drawing area; a first user draws in the exclusive area through a
graph drawing assembly, real-time coordinate data is stored as a structured object according to a
time sequence, and after completion, a first picture is generated through
screen capture and uploaded to a far-end
server to be encrypted and stored. And after confirming that the storage is successful, the
server synchronizes the drawing completion state of the first user to the second user through a
network communication protocol containing an error detection and
retransmission mechanism. And after the second user receives the state, obtaining the first picture from the
server, performing zooming, translation, rotation and resolution
adaptation processing, performing supplementary drawing on the adapted picture, and after completion, performing
screen capture to generate a second picture and uploading the second picture to the server. And after both the two pictures finish drawing, carrying out layer fusion and overall
adaptation processing on the two pictures, and finally generating a collaborative work.