Cairo is considered the most important city in Egypt. Mokattam area is located in the Eastern Greater Cairo and it is subjected to dangerous phenomenon since 1989. For detecting crustal movement in this area, an optimal geodetic network has been designed and established in this area. This network consists of 13 stations distributed on the upper, middle, lower Mokattam plateaus and outside the area of Mokattam. This network has been observed with traditional techniques in the year of 1995. Remarkable horizontal movements have been detected through this year. Height measurements have taken place to detect the vertical movement of this area in the year of 1997. For precise continuous monitoring, three GPS measurements have been taken from June 2000 to June 2001. The results of measurements proved that the middle and lower plateaus of Mokattam are stable, while there is a remarkable horizontal movement at the upper plateau. The horizontal movement of the upper plateau reached to 5.88 cms through a year and taking the north-east direction at all network stations. This amount of movement is considered relatively large and give an alarm toward this area.