he cultural and economic landscape of Fuzhou City in Fujian Province, China, is rich and diverse. Management effectiveness and emotional intelligence in diverse workplaces in Fuzhou City, Fujian Province, China, have been the subject of related research. The significance of emotional intelligence in fostering a productive workplace is a hot topic, as it allows individuals to recognize, understand, and manage their own emotions and those of others (Kargeti, 2023). Additionally, leadership effectiveness is influenced by emotional intelligence dimensions such as self-awareness, self-regulation, motivation, empathy, and social skills (Tian, 2022). Therefore, this study aims to investigate the factors influencing Leadership Effectiveness based on 5 aspects: Demographic Factors, Emotional Intelligence, Cultural Diversity in Organization, Communication Strategies, and Leadership Styles. The quantitative method is applied. Descriptive statistics such as frequency, percent frequency, the arithmetic mean, and the standard deviation are used to analyze the data collected from questionnaires. Suitable Inferential Statistical Methods are used to test the hypothesis, particularly the Independent Samples t-test, the One-way ANOVA, and the Multiple linear Regression Analysis. The results obtained from the study indicate that differences in Marital Status, Age, Educational Level, Monthly Income, and Working Experiences generate differences in Leadership Effectiveness. Based on the Multiple Linear Regression Analysis, all aspects of Emotional Intelligence (Self-awareness, Self-regulation, Motivation, Empathy, and Social Skills), Cultural Diversity in Organization (Diversity, Equity, Inclusion, and Belonging), Communication Strategies (Awareness and Understanding, Communication Quality, Accessibility, and Employee Engagement), and Leadership Styles (Decision-making Leadership Styles, Everyday Leadership Styles, Beyond Everyday-work Leadership Styles, Values-based Leadership Styles) are found out to have a positive impact on Leadership Effectiveness.