Water crisis is a challenge in today world, which requires different countries to manage water sources in an efficient way. Human activities in watersheds, inappropriate applications and crop pattern changes besides population and water demand growth, has severely limited water sources in recent decades, being one of the major factors for advent and increment of drought. Regarding the necessity of agriculture development as the food supplying section of the society, the use of modern and water efficient irrigation systems is essential. Sprinkler irrigation is one of the pressurized irrigation methods which increases water consumption efficiency along with reduction of labor cost due to more uniform distribution of water across the field. Precision farming is a new branch of agriculture based on the site-specific use of inputs, according to soil, plant and microorganism needs. One of the inputs for agricultural production is water which is getting more and more limited because of cultivated area increase from one hand and decrease of rainfall and underground water levels from the other hand. Thus, the efficient use of water sources based on the variable rate irrigation is considered to be a basic approach of precision farming. The main purpose of this study was to design and fabricate an intelligent variable flow sprinkler, applicable in solid set sprinkler irrigation system with removable sprinkler. The preliminary drawing of the proposed sprinkler was simulated based on the dimensions of available sprinklers using Fluent software. The actual sprinkler was then fabricated and field evaluated. To measure performance parameters of the sprinkler, it was evaluated at three pressure levels, three plunger positions and three diameters of nozzle opening. The software could properly simulate flow variations resulted from different pressures, plunger positions and nozzle diameters. Simulation results of outlet flow and pressure for the 8 mm nozzle were more compatible with those of sprinkler field evaluation. According to the obtained results of outlet flow and pressure, plunger position of D3 was introduced to be the best status. The sprinkler outlet flow rate indicated an ascending trend as water pressure increased and the cross section of water extended as a result of plunger displacement. However, the sprinkler coefficient (Kd) and distribution intensity (I) decreased as the pressure increased. In field evaluation of the sprinkler, the 8 mm nozzle together with plunger position of D2 and the pressure of 6 bars presented the longest sprinkling diameter. The least pressure drop on the nozzle head was observed with 8 mm nozzle in D3 position of plunger. With 12 mm nozzle and plunger position of D2 at water pressure of 6 bar the maximum flow rate was reached. It was also revealed that the variable rate sprinkler could effectively vary the flow rate through different plunger displacements. Simulating the sprinkler in rectangular and triangle arrangements, plunger position D3 indicated the highest Du and Cu values. The best uniformity was observed in 23×23 m distance of sprinklers in rectangular arrangement. In triangle arrangement test with a 10 mm nozzle, pressure of 6 bars and plunger position of D3 uniformity and overlap (in 30×30 m distance of sprinklers) were 84% and 40%, respectively. Keywords : variable rate sprinkler, precision farming, irrigation, simulation