Due to the randomness and volatility of wind power, the high proportion of wind power and system disturbance will make the frequency of the wind-diesel power system fluctuate. Load frequency control (LFC), as an essential method, can adjust the frequency of the power system to maintain stability and security. However, the multi-regional interconnection of wind-diesel power plants introduces the communication network, which will have to overcome the problems of limited bandwidth and the risks of cyber attacks. In this paper, we propose an adaptive event-triggered $H_{\infty}$ LFC method, which is under deception attack for the wind-diesel power system. First, the multi-area wind-diesel power system is modeled, which is subject to deception attack. Second, an adaptive event-triggered scheme is given to reduce the network communication load. Then, by using Lyapunov theory, the stability criterion of the system is given, when deception attack and adaptive event-triggered mechanism are considered simultaneously. Moreover, $H_{\infty}$ load frequency controller gain is derived by stability criterion. Finally, the three-area power system simulation example is used to clarify the feasibility of our proposed method.