Rumi's journey in acting began in 1988 with the play "Kreetodash". During the same year, he made his debut in the showbiz industry with the television drama "Kon Kanoner Phool", which earned him praise for his performance. Alongside television, he has also acted in several movies. In 2009, he debuted his silver screen with the film "Doriaparer Douloti".

Renowned television actor Waliul Haq Rumi, known for his engaging performances in various dramas, has been battling against cancer. The actor was diagnosed with colon cancer just a month ago,  prompting him to initially seek treatment in Chennai, India. However, despite his return to Bangladesh, his struggle continues as he undergoes treatment at a private hospital in the capital city.