With the rapid development of mobile communication, it is not only to improve transmission speed and communication quality but also to charge the receivers. For system design, it is the goal that the sensor device can be charged while transmitting data. As a result, the operation time of the sensor device is increased. In this paper, the antenna array system is used for the beam synthesis at the transmitter in the indoor environment. For multiple users, the error rate of transmitting data to one specific receiver is set to be under the constraint of preset value and the energy collection efficiency of the other user is maximizing. The SADDE algorithm is used to adjust the feed line length of the antenna to maximize the objective function. This paper focuses on the simultaneous transmission of data and charging, and considers the use of multi-objective functions. The advantage of using objective functions. The advantage of using SADDE is that it is not necessary to have the exact gradient mathematical formula between variables. In addition, the SADDE can handle multiple objective functions. This paper simulates the indoor environment communication transmission bit error rate plus energy collection efficiency, and then uses the SADDE to optimize the adjustment of the feed line length. This antenna can optimize the energy harvesting efficiency for indoor environments. Through the simulation of the indoor environment by the SADDE adjustment, it is seen that each antenna component is optimized to avoid unnecessary waste of energy, thereby improving the energy collection efficiency and reducing the error rate of a specific user, and improving the communication quality.