Doraemon is sent back in time by a Young boy named Sewashi Nobi to improve the Circumstances of his grandfather, Nobita, so that his descendants may enjoy a better future. In the original timeline, Nobita experienced nothing but misery and misfortune manifested in the form of very poor grades and bullying throughout his life.

In order to alter history and better Nobi family's fortune, Sewashi Initially wanted to send super robot to protect Nobita, but with his meager allowance he could only afford an imperfectly made factory rejected toys: an anthropomorphic robot cat called Doraemon.

Doraemon had a pocket called "4th Dimensional Pocket" from which he produced Gadgets, medicines, and tools from the future. Thousands of gadgets have been featured in the series with such as the "Hopcopter / Takke Copter", a small head accessory that allows flight and the "Anywhere Door" , a door that opens up to any places as the user wishes.

Nobita's closest friend is Shizuka Minamoto, who also serves as his romantic interest. They are tormented by bully Takeshi Goda nicknamed "Giant" and the cunning and arrogant Suneo Honekawa.

A typical story consists of Doraemon using various gadgets to assist Nobita that often causing more trouble than he can solve