Laboratory medicine is an evidence-based medicine which involves a set of medical diagnosis conducted on tissues, fluids, or other specimens to assist clinical staff and medical doctors in disease diagnosis and patients treatment. Chemical, cytological, haematological, microbiological, histological, and molecularly techniques are employed in the process of acquiring the diagnostic results. Quality assurance of the medical laboratory is regulated and accredited by international standardisation organisations. The whole process of patient-centred laboratory medicine could be described into five stages: screening of diseases, risk identification and stratification, clinical diagnosis, selection of medical treatment by physicians and continuous monitoring of drug efficacy and side effects. It was reported that the pre-analytical process is the major laboratory errors and thus elimination of these errors is critical for maintaining patient-centred laboratory medicine. Advanced development of molecular medicine and automation of clinical system requires development of laboratory medicine while systematic quality management should be maintained for good quality of medical practice. Foreseeably further laboratory medicine may contribute to targeted therapy and personalised management.