We propose a fast computation algorithm for finding stable molecular structures through the use of many network-connected computers. New trial structures are repeatedly generated with this algorithm by gathering and using the potential energy and gradient information calculated simultaneously for multiple-trial molecular structures on various Computers connected through a network. This method achieves efficient parallel computation in distributed and dispersed Computer environments and enables molecular structures to be rapidly optimized. (C) 2004 Elsevier B.V. All rights reserved.