Sheik Khalid bin Ahmed Al Khalifa made the comments at the start of a meeting in the Bahraini capita, Manama, aimed at bringing together financial experts to improve the fight against extremist fundraising.
He urged delegates to set a path to ensure that financial institutions and charities cannot funnel funds to terrorist groups, and "put an end to their ability to smuggle goods and extort funds from commercial enterprises."
The head of the US Treasury Department's effort to undermine the Islamic State's finances, David Cohen, last month estimated the group was earning about USD 1 million a day from black market oil sales alone.
The one-day gathering follows a meeting in Paris in September in which diplomats from around the world pledged to fight Islamic State militants "by any means necessary."
It includes representatives from several Arab nations, Western countries including the United States, Britain and France, as well as China and Russia. International bodies such as the World Bank and the International Monetary Fund also participated.