In the "Internet +" environment, with the emergence of new ideas and new technologies such as mobile Internet, big data, cloud computing etc., the traditional logistics industry begin to integrate deeply with the Internet. Through defining the concepts of "Internet +" and "Internet + logistics", the paper analyze the value connotation of "Internet + logistics" from three aspects as integration of logistics value, reconfiguration value chain and disintermediation function. And then based on seven theories as resource base/dependence, transaction cost, principal-agent, long tail, market equilibrium, consumption sovereignty and value chain, we study on the theoretical connotation of "Internet + logistics". Moreover, the development path of "Internet + logistics" is proposed, which exist three typical modes: platform mode, crowdsourcing mode and cross-border mode.