Abstract: A Web 2.0 map is the kind of spatial information platform where customer may participate mapping,and where cartographic information transmission is two-way between customer and map.Thus,Web 2.0 map influences the transmission model of map information of A.Kolacny,where information transmission is one-way.We suggest a kind of two-way transmission model for Web 2.0 mapping based on Kolacny Model by means of a designed method of layering for Internet.This two-way model will enrich and perfect map communication theory in the Web 2.0 environment.