The invention discloses a three-dimensional (3D) printing 
system based on 
cloud data and a printing method thereof. The 
system comprises a 
machine body, a control box, a 
storage tank and a spray head, wherein a forming table is fixedly mounted in the center of the upper end of the 
machine body; a partition mechanism is arranged in the 
machine body; and a supporting plate is horizontally and fixedly mounted at the left side end of the machine body. According to the 3D printing 
system based on the 
cloud data and the printing method thereof provided by the invention, after a computer draws a picture, picture information is numbered and then stored in a 
cloud database; and when printing is needed, a picture information number is input through an input module, numbered information is transmitted and emitted through a first 
wireless receiving and transmitting module through the control box, the numbered information is received through a second 
wireless receiving and transmitting module, the data is transmitted to the interior of a terminal controller, the terminal controller retrieves the interior of the 
cloud database through a first retrieval module, image data matched with retrieval is sent out through the second 
wireless receiving and transmitting module, and the image data is received by the first wireless receiving and transmitting module and transmitted to the interior of the control box, so that subsequent printing work is facilitated.