This guide provides a detailed overview of the design and optimization of CRISPR gRNA/Cas9 plasmids for genome editing applications. It outlines the workflows involved in CRISPR/Cas9-mediated gene editing, including the selection of genetic modifications, expression systems, and the analysis of gene sequences. The document describes various plasmid vector components and their applications, emphasizing the importance of selecting appropriate vectors for different model organisms. Additionally, it presents methodologies for synthesizing gRNA/Cas9 vectors and discusses the verification of gene editing outcomes, including the assessment of on-target and off-target effects. The guide also highlights the use of online tools for gRNA design and genome-wide database access, facilitating the identification of optimal gRNA sequences for specific applications. Overall, this resource serves as a comprehensive reference for researchers looking to implement CRISPR technology in their laboratories.