The invention discloses an information processing method and a mobile crowd sensing (MCS) application platform. The method comprises the following steps: an MCS application platform receives an MCS task meeting preset rules released by an MCS task initiator; the MCS application platform announces the MCS task, wherein the MCS task contains M subtasks, and M is a positive integer greater than zero; the MCS application platform and an MCS task participant carry out communication interaction on the subtasks using a first transfer protocol to make the privacy of the receiver not known by the sender; and the MCS application platform and an MCS task participant verify the communication interaction on the subtasks using a first verification mechanism, and find a target user from users passing verification in order to maximize the number of subtasks completed efficiently through the target user.