The types of decisions people make depend on how much knowledge or information they have about the decision environmental situation or called state. There are three decision-making environments: decision making under certainty, decision making under uncertainty and decision making under risk. Based on possibility theory and evidence theory, a new indeterminacy decision making approach with the decision-maker’s environmental knowledge information about the state of nature is proposed. This approach provides a general framework for three types of decision problems, that is, deterministic, risky and uncertain problems.