The integration of cloud computing and Wireless Sensor Networks (WSNs) to create Sensorcloud helps in extending the data processing capability and storage capability of WSNs. Knowing how weak
WSNs are with regards to communication ability, how to collect and upload sensory data to the cloud in
limited time has become an issue in Sensor-cloud. In the last decade, with increasing interest by researchers
in the domain, a considerable amount of research works have been conducted and published in the research
domain. The main objective of this study is to systematically review the current research on data collection
in Sensor-cloud. Hence, the study also aims at identifying, categorizing, and synthesizing important studies
in the field of study. Accordingly, an evidence-based methodology is utilized in this study. By doing so, 43
relevant studies were identified and retrieved to answer the formulated research questions. The systematic
methodology offers a methodical and rigorous study selection and evaluation process that is repeatable
and precise. The result shows that research on data collection in Sensor-cloud is relatively consistent with
stable output in the last five years. Ten proposal contributions were identified with System, Framework, and
Algorithm being the most used by the selected studies. In conclusion, key research challenges and future
research directions were identified and discussed for researchers to propose effective solutions to the existing
challenges. Although research on data collection in Sensor-cloud is gaining some traction in recent years,
the works in the domain are not sufficient and concrete proposals are needed to improve data collection.