The embodiment of the invention relates to the technical field of data transmission, and discloses a data transmission method and device, a mobile terminal and a storage medium. The data transmissionmethod comprises the steps of determining whether received environment data sent by at least one Internet of Things device needs to be uploaded or not according to a network state of the mobile terminal; when it is determined that the received environmental data sent by the at least one Internet of Things device needs to be uploaded, determining an uploading mode of the environmental data according to the network state; and uploading the environment data to a server according to the uploading mode. According to the invention, when the mobile terminal judges that the received environmental datasent by the Internet of Things equipment is uploaded, the uploading mode of the environmental data is determined according to the network state of the mobile terminal, so that the uploading efficiency of the environmental data is improved, and the problem that the Internet of Things equipment uploads mass data is solved.