The present article aims at studying the relationship between urban historical landscape approach and urban livability. The term viability refers to degree of meeting society requirements based on people’s needs and capacity in that society. Environmental pollution with external sources, ethnicity, reducing social capital, reducing sense of belonging to location, being surrounded by mountains, speculation, lack of viable land in Ilam city have faced it with challenges. This study aims at recognizing effective factors on Ilam viability. Research method in this study is survey. Sampling and data gathering is done through questionnaire and interview. Statistical population is all eighteen-year-old an over Ilam citizens and according to Cochran formula 383 people have been selected as sample size. In theoretical elements of the research, approaches of urban geography, urban economy, urban planning, and urban sociology have been used. The research findings showed that average economical viability satisfaction is (49.1), average social viability satisfaction is (55), and average environmental viability satisfaction is (32.66).