The invention relates to an RDP plaintext data analysis method and an apparatus thereof. The RDP plaintext data analysis method comprises the following steps of acquiring one complete RDP plaintext data message; then determining a type of the complete RDP plaintext data message; and finally, carrying out differential processing on the RDP plaintext data messages with different types and extracting interaction information between a client and a service terminal. In the invention, RDP plaintext data analysis time is saved, a log can be rapidly generated and a user experience is increased. The method and the apparatus can be applied to the data acquisition audit field.