The invention relates to a large image cache method based on
power grid topological analysis, and a display method and a display
system thereof. The large image cache method comprises the step of computing cache weights of each node, and caching the nodes with the cache weights more than a set threshold, wherein computation of the cache weights specifically comprises the sub-step of comprehensively considering influence,
vulnerability and topological structure characteristics of the nodes, and overlapping to form the final cache weights, wherein the influence is measured by tight centrality orbetweenness centrality of the node, the
vulnerability is measured by an element online rate, and the topological structure characteristics correct the cache weight of the node according to the position of the node in a topological structure. Compared with the prior art, the method provided by the invention caches the nodes with better user preference according to priorities, and thus next front-end loading efficiency is improved.