We report a novel and convenient method for rapidly preparing and simultaneously immobilizing a homogeneous DNA origami network on a dry mica surface using a binary solvent. This DNA origami network can be easily obtained through a dewetting process using DNA origami species with initial bar structures. This method for inducing the emergence of two-dimensional network structures with high and uniform densities over large areas is highly valuable for quickly building the scaffolding necessary for fabricating molecular nanoscale network devices.