The invention discloses a hot connecting data sharing application method based on a cloud, which comprises the following steps as follows: S1: an intelligent terminal A opens a data sharing application to select shared data information; an intelligent terminal B opens a browser to enter a cloud server webpage; S2: the intelligent terminals A and B collide; S3: a cloud server is connected; S4: the cloud server receives and processes the information of the intelligent terminals A and B; S5: the intelligent terminal B and A establish hot connection; S6: the intelligent terminal B obtains download information and the shared data information of the data sharing application and selects to install a sharing application or directly obtain shared data; and S7: the intelligent terminal A and B share the data. According to the method, the hot connection can be established quickly, the user operation interestingness is improved, the redundant steps of a user to establish the hot connection are reduced, the data sharing application is not required to be pre-installed on the intelligent terminal B, and the great convenience is provided for the data sharing.