1. A method for executing an application chain of multiple applications on a terminal device, comprising: acquiring the application chain in response to detecting a specific action or event on the terminal device that triggers an execution instruction of the application chain, wherein the application chain is preset by adding application identifier for each applications in a sequence; determining a current application to be executed according to the sequence of application identifiers in the application chain, wherein an application is set as the current application when a preceding application in the application chain has been executed or has begun to be executed; executing the current application by determining an execution action according to an executable content type of the current application and an execution result of the preceding application in the application chain, wherein the execution of the current application further comprises: determining whether the executable content type of the current application belongs to the executable content type of the preceding application if the preceding application is in execution and the execution result of the preceding application is pending; sending the execution result of the current application to the preceding application in execution while executing the current application if the executable content type of the current application belongs to the executable content of the preceding application; determining whether the execution result of the preceding application belongs to the executable content type of the current applications if the preceding application has completed execution; and setting the execution result of the preceding application as the content of the execution action of the current application and executing the execution action if the execution result of the preceding application belongs to the executable content type of the current application; setting a succeeding application of the current application in the application chain as the current application; and executing the application chain until all the applications in the application chain have been executed.