Electricity consumption increases over time, especially in the household sector, according to data from the Ministry of Energy and Mineral Resources, per capita electricity consumption will increase to around 1,285 kWh in 2023. This increase in consumption is often not accompanied by optimal monitoring and control of usage, thus potentially causing energy waste. In addition, poor power quality can reduce energy efficiency and accelerate damage to electronic equipment. This study designs a power quality monitoring system and Internet of Things (IoT)-based electrical load control using an ESP32 microcontroller, two PZEM-004T sensors, an I2C LCD, and the Laravel web platform. The system monitors voltage, current, power, energy, and frequency parameters in Real Time, and controls the load via a Relay remotely. Tests show voltages ranging from 221–227 V, currents from 0.05–0.31 A, power from 5.5–46 W, and energy up to 0.699 kWh, with very small measurement deviations from standard measuring instruments. These results prove the system is capable of working accurately, stably, and responsively. The implementation is expected to increase the efficiency of household electricity consumption and prevent damage due to poor power quality.