This study presents a detailed analysis of smart environment indicators within the context of smart cities, based on a systematic review of 74 articles retrieved from the Web of Science database. Quantitative approaches, including keyword cloud visualization and co-occurrence network mapping, revealed main thematic clusters with a particular emphasis on sustainability assessment frameworks, technology integration, energy performance, and comparative urban studies. A qualitative review was done on a subset of selected articles identified key indicators under five categories: Environmental Sustainability, Energy and Resource Management, Transportation and Mobility, Urban Planning and Development, and Social and Economic Development. The leading indicators include air quality, renewable energies, electric vehicles, green spaces, education, and governance. Furthermore, an alignment of these indicators with the United Nations Sustainable Development Goals (SDGs) revealed that 10 out of the 17 SDGs are directly supported by the smart environment indicators uncovered, demonstrating strong alignment with international sustainability goals. Overall, the findings highlight the multi-dimensionality of smart environment measurement and the need for integrated approaches embracing environmental, technological, and socio-economic aspects in pursuing sustainable urban development.