The article presents the results of an empirical study conducted with the aim of adapting the Positive and Negative Affect Schedule into Kazakh and identifying the influence of the frequency of emotions, determined by this method, on the level of happiness. During the study, it was verified that the sample corresponds to the normal distribution law, and based on this result, parametric methods were used in the analysis of indicators. The Positive and Negative Affect Schedule proposed by Watson, Clark and Tellegen was translated into Kazakh and adapted to the characteristics of the nation and language. Cronbach's alpha for total and individual elements was above 0.8 and was statistically valid. Pearson's correlation analysis was carried out to determine the relationship between positive and negative affect and the index obtained from the Oxford Happiness Questionnaire. We found a positive relationship between positive affect and happiness and a negative relationship between negative affect and happiness. In the course of one-way analysis of variance, it was found that the frequency of positive and negative emotions influences happiness and it was determined that happiness depends on positive affect in 27.7% of cases, and on negative affect in 15.2% of cases by regression analysis. The researchers and psychologists working in the direction of positive psychology can use the results of the study in their work with Kazakh-speaking people.