Epistemic logic is known as logic that captures the knowledge and beliefs of agents and has undergone various developments since Hintikka (1962). In this paper, we propose a new logic called agent-knowledge logic by multiplying the individual knowledge structure with the relationships among agents. This logic is based on the Facebook logic proposed by Seligman et al. (2011) and the Logic of Hide and Seek Game proposed by Li et al. (2021). We show that this logic can embed the epistemic logic we know well. We also discuss various sentences and inferences that this logic can express.