Nanomaterials have multifaceted behavior in bacterial environment, including communication, influencing bacterial interaction, and resistance mechanisms. Nanomaterials are valuable in increasing the work against single-currency bacterial pathogens, combating their antibiotic resistance and biofilm formation. They can weaken bacterial defense systems, limit the spread of infections, and provide new strategies to contest antibiotic resistance in bacterial infections. The subsequent sections summarize the basic understanding of their mechanistic roles. Nanomaterials can disrupt the cell walls and membranes of bacteria, causing cell lysis and cell death. They can disrupt the formation of biofilms, the matrix surrounding bacterial communities, which are essential for bacterial survival and persistence. Nanomaterials can modulate bacterial quorum sensing, which regulates gene expression based on population density, thereby reducing virulence. Nanomaterials modulate bacterial quorum sensing by affecting signal transduction (secretion, synthesis, accumulation) and signal transduction (sensing, response). Their behavior is influenced by environmental factors and intrinsic properties, which are important to enhance their regulatory activity in bacterial communication. Nanomaterials can cause impaired membrane permeability, sub-lethal stress to bacteria, and may have long-term environmental consequences. The composition and function of microbial community’s cab altered by presence of nanomaterial in environment such as wastewater treatment system. Although nanomaterials have shown promising applications in bacterial regulator, concerning their potential toxicity and environmental impact to beneficial microbial communities requires further investigation. This study identifies the mechanisms by which bacteria resist metal nanoparticles, including extracellular complexes, ROS response, DNA repair, genetic alterations, metal effector pumps, adaptive morphogenesis, and plasma membrane changes, emphasizing their behavior in bacterial environment.