In this work the design and implementation of Automatic Microcontroller-Based Controlling of Single Phase Power Factor using Capacitor Banks with Load Monitoring is performed in correspondence with the attached load to the system. The system will continuously monitors the load and how much lead or lag occurred in power factor, its type and behavior of the load enduring at that time and what consequences it produces on power factor. This paper intended an automatic controlling of power factor by using the intelligent decisiveness of microcontroller. The microcontroller estimates the power factor and then examines the similarities or differences with the referenced value. The suggested scheme in perspective of controlling the power factor has a main vantage of choosing the direct value of capacitor that is needed to mount the necessitate amount of reactive power in order to cater the current utilization by the load. The prevailed results have affirmed that the suggested scheme is able to yield a reliable output and can be furthermore pursued in practical applications.