The integration of emerging technologies in Internet of Things (IoT) systems focused on Industry 4.0 has emerged as a topic of relevance in the technological field of digital transformation, this process offers opportunities to improve operational efficiency, decision making and process optimization. This article focuses on the systematic literature review (SLR), for a detailed understanding on the different approaches, challenges and opportunities related to the implementation of advanced technologies with IoT in various Industry 4.0 environments. Seventy-three articles published between 2020 and 2024 were reviewed, of which 26 primary studies were identified that address issues of most used technologies in integration with IoT for Industry 4.0 such as Blockchain technologies, Digital twins, Artificial Intelligence, Big Data, Edge Computing, Cyberphysical systems, Smart devices, sensors, robotics, and wireless sensor networks. The review revealed the need for reference frameworks, standards and protocols for the integration of advanced technologies with IoT. In conclusion, the diversity of approaches underlines the importance of leveraging emerging IoT technologies to drive the Industry 4.0 transformation.