1. A method for processing task data implemented by a computer system, comprising: receiving a task-data-processing request sent by a client, wherein the task-data-processing request contains a type identifier of task data, and the type identifier of the task data includes a daily-task-data identifier, a mainline-task-data identifier, a random-task-data identifier, or a combination thereof; processing the task data corresponding to the type identifier of the task data to generate processing results, according to the type identifier of the task data and a preset processing scheme corresponding to each type of the task data; and returning the processing results to the client; wherein, when the type identifier of the task data includes the daily-task-data identifier, the processing of the task data includes: when information of a player currently using the client is determined to include a first time login of a day, randomly obtaining daily task data from a daily-task-data pool according to the daily-task-data identifier, to generate a daily task list containing identifiers of the daily task data; and wherein, accordingly, the returning of the processing results to the client includes: returning the daily task data to the client.