A method of multi-attribute grey target group decision-making based on Choquet integral is proposed for the multi-attribute group decision-making problems that there are correlation between attributes and attribute values are interval grey number. Firstly, the Choquet integral information integration operator of interval grey numbers is defined according to the properties of the fuzzy measure and Choquet integral, and the related properties are proved. Then, the scheme set is sorted by using the method of gray target decision-making. Finally, a simulation example verifies the rationality of the proposed method.