The Area Frame Sample for maize has been built to determine the random distribution of observation sites in all sub-districts in Indonesia. The principle and workings of the area frame sample for the rice crop were applied to the observation of maize plants. The difference is in the size of the segment being built, which is 100 x 100 meters in size and there are 4 units of observation points. The surveyor observes the maize growth stage with an application on the mobile phone then sends the results of the observations to a central server for processing. The growing phases and field conditions observed were Early Vegetative, Late Vegetative, Early Generative, Late Generative, Early Harvested, Young Harvested, Shilled Maize harvested, Land Preparation, no maize plant, non agriculture area and damage area or puso. This article describes the proposed Sampling Frame of Square Segment by Points for Maize Observation which carried out in Garut Regency, West Java, Indonesia.