Abstract: The platform organization is developing rapidly to meet the increasing demand of the market and attract the attention of the academia and industry under the background of Internet plus. Based on the theory of organizational ecology, this paper analyzes the functions and characteristics of the crowd innovation space（CIS） by using social network and grounded theory. It finds that the CIS has similar characteristics with platform and platform organization, which can provide interactive communication interface, realize the rapid accumulation and iteration of resources, promote the formation of ecological network, and facilitate innovation ability to drive innovative development. Secondly, this paper puts forward that the CIS platform organization , which is a kind of ecological network that is constructed based on Internet background and can rapidly aggregate and iterate the resources to bolster bilateral or multilateral interaction, reinforce the creativity of the participants and satisfy their heterogeneous demands. Finally, this paper proposes some research prospects from the generation and evolution of ecological network, the element structure of ecological network, the function mechanism between platform organization and actors and the platform evolution of tradition organization.