An information transmission method performed at a first mobile terminal having a processor and memory for storing one or more programs to be executed by the processor, the method comprising: initiating an information retrieval application at the first mobile terminal; detecting a predefined user operation on the first mobile terminal to retrieve information from a web browser running on a second terminal, wherein the web browser includes a plug-in bound to a user account associated with the first mobile terminal; in response to the predefined user operation, sending an information transmission instruction to the plug-in at the second terminal, wherein the plug-in is configured to process, according to the information transmission instruction, webpage information of a current web page in the web browser, and overlay the processed webpage information on top of the current web page in the web browser; receiving at least a portion of the processed webpage information from the second terminal; and displaying the received webpage information on a display of the first mobile terminal; wherein the plug-in was pre-installed in the web browser and bound to the first mobile terminal before receiving the information transmission instruction from the first mobile terminal; the first mobile terminal and the plug-in in the web browser are configured to perform the following operations to be bounded together: the first mobile terminal: obtaining ingress information of the plug-in from the second terminal, wherein the ingress information comprises address information and identification information of the plug-in; sending the ingress information of the plug-in and the user account information associated with the first mobile terminal to a user account binding server; receiving a first binding notification message from the user account binding server, wherein the first binding notification message comprises the ingress information of the plug-in bound to the first mobile terminal; and the plug-in receiving a second binding notification message from the user account binding server, wherein the second binding notification message comprises the user account information associated with the first mobile terminal bound to the plug-in. initiating an information retrieval application at the first mobile terminal; detecting a predefined user operation on the first mobile terminal to retrieve information from a web browser running on a second terminal, wherein the web browser includes a plug-in bound to a user account associated with the first mobile terminal; in response to the predefined user operation, sending an information transmission instruction to the plug-in at the second terminal, wherein the plug-in is configured to process, according to the information transmission instruction, webpage information of a current web page in the web browser, and overlay the processed webpage information on top of the current web page in the web browser; receiving at least a portion of the processed webpage information from the second terminal; and displaying the received webpage information on a display of the first mobile terminal; obtaining ingress information of the plug-in from the second terminal, wherein the ingress information comprises address information and identification information of the plug-in; sending the ingress information of the plug-in and the user account information associated with the first mobile terminal to a user account binding server; receiving a first binding notification message from the user account binding server, wherein the first binding notification message comprises the ingress information of the plug-in bound to the first mobile terminal; and the plug-in receiving a second binding notification message from the user account binding server, wherein the second binding notification message comprises the user account information associated with the first mobile terminal bound to the plug-in.