Due to the expansion of the process of industrialization and technological progress, which takes into account the quantitative aspect of human life, as well as neglecting the qualitative aspects of human life, attention to the concept of quality of life has increased in Western countries over the past few decades. . Today, the quality of life is an issue that concerns all governments and most international organizations, and there is a general agreement among researchers, policymakers, and development planners regarding the need to study the quality of life. The research findings show that the quality of life has many different dimensions, fields and indicators, which in most cases are directly related to economic development. In this research, the quality of life in the dimensions of satisfaction and happiness (subjective dimensions) and environment, security and income (objective dimensions) have been considered, and then the relationship between the quality of urban life and economic development has been investigated. The statistical population of this research is all people over 18 years of age in Lahijan city, using Cochran's formula and using simple random sampling method, 412 samples were selected and information was collected by a researcher-made questionnaire. The results of the research show that the dimension of security is above the average level and the dimensions of satisfaction, income and also the quality of the environment are below the average level.