Principle objective of this lecture is to present on Water on Mars. Here briefly present Geological Evidence of this subject. In the Earth picture, rain water flowing under and seeping along the base of a recently-deposited volcanic ash layer has created the gully. Liquid water may still flow on Mars, but that doesn’t mean it’s easy to spot. The search for water on the Red Planet has taken more than 15 years to turn up definitive signs that liquid flows on the surface today. It’s tempting to say that the announcement of liquid water on the surface of Mars heralds a new era in Martian exploration.