In this review, will be summarize the principle of these new methodologies and the impact of omics-techniques, mainly genomic-transcriptomics (analysis of single nucleotide polymorphisms or gene-expression) and proteomic (identification and quantification of proteins), in the knowledge of different aspects of allergy diseases (diagnosis, screening, monitoring of treatment, protective or risk biomarkers and drug development) and the advance to define the personalized and molecular medicine in this complex kind of diseases