Sagar entered the film industry in 1966 as an actor, portraying lead role in first children's cinema in East Pakistan President.

He also started writing literature, some mentionable publications are: A Story Bokk, Meghna-O-Galpa Buro, Meghna and Aladin's lamp, Meghna-O-Eti, Cox's Bazar Kakatua or Television, Jibober Shangee.

Adventure, mystery, travel, reminiscence, horror, Liberation War, science fiction - these are varieties of genres that he has in his bag of creativity, for children.

By his initiatives, he has made a neutral ground for open dialogues on Channel-i named Tritiyo Matra which is successfully going on air for the last six years.

Through this program, he has made a common ground for opinion sharing among the political, economic, social leaders and the mass people.