Since the major objective of the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission is to study the Martian atmospheric structure and its evolution, it is important to investigate the mechanisms for loss of volatiles on Mars. One of the heat sources for inducing escape is the incident plasma and the pick-up ions. With the variation of the solar wind conditions, the surface crustal field distribution, and the seasons, the influence of the incident ions can change considerably. I will summarize my results on different case studies and provide a general feature of the plasma-induced heating and loss on Mars, which can be further compared when the measurements from the MAVEN mission are available after orbit insertion in September.