My father had a brain hemorrhage before 3 years. It affected his memory and also he lost control on urine. His age is 70 years. So whats the treatment?

Depends on cognition. Also how much of brain & nervous system is affected. Need to consult urologist with expertise in managing urinary incontinence, Father might be candidate for an artificial urinary sphincter, providing he is adequately dextrous. Otherwise might be candidate for condom catheter &/or medication.