The purpose of this study is to evaluate the cognitive perceptual performance skills in relation to activities of daily living(ADL) by using Lowenstein Occupational Therapy Cognitive Assessment(L0TCA) to measure the cognitive perceptual performance and FIM to measure the ADL. The subjects in this study were 24 stroke patients who were admitted for intensive treatment at Department of Rehabilitation in Samsung Medical Center from December. 1997 to June. 1998. SAS was used to analyze data. Using simple regression analysis was used to measure influence of LOTCA on FIM at discharge and to measure influence of patient's concentration on both FIM and LOTCA. Stepwise multiple regression analysis was used to confirm the relationship of FIM to each subtest of LOTCA. The results of this study are as follow : 1. Statistically. LOTCA score at admission showed correlationship with FIM score at discharge. (R2 = 0.50. p<0.0001) 2. Visuomotor organization showed the most significant correlation between LOTCA on FIM at discharge. Motor FIM with perception and visuomotor organization, and cognitive FIM with perception showed significance. 3. The relationship between each subtest of FIM and each subtest of LOTCA. self-care was significantly correlated with visuomotor organization and perception. sphincter control was significantly correlated with orientation and perception, mobility and locomotion was significantly correlated with orientation and visuomotor organization, communication was significantly correlated with perception, social cognition was significantly correlated with perception and thinking operation. LOTCA is significantly correlated to FIM at discharge. Therefore, LOTCA can predict the ADL performance skills. Also, orientation and perception are the most predictable area of LOTCA throughout the entire subtests.