Urinary Tract Infection is the kind of infection which is caused by microorganism growth in human’s urinary tract. The ordinary indication of urinary tract infection is known by some parameters, such as difficulty urinating, the abnormal of urine color, less volume and slow urinary discharge, that is why the writer need uroflowmetry tool to measuring the discharge, purity, and volume of urine. On this tool, in one side the writer use YF-S201 sensor with frequency pulse output and will be converted become Ml/s, volume measuring use HC SR04 sensor reading with converted distance value become mL, on the other hand urine purity measuring use diode photo. For operating the data in LCD display, the writer using ATMega8 as microcontroller processor. With the result of error final volume analysis in measuring cup is recorded 100 Ml and 200 ml reached 4%, 300 ml reached 3,1%, 400 Ml reached 0,075% and the highest difference of urine discharge reached 3,3 ml/s. After did the module experiment and testing also data collection, it could be concluded that uroflowmerty tool by 3 parameters (discharge, purity and volume)” works success and could be used for urinary tract infection diagnosis.