OBJECTIVES: On behalf of the European Association of Urology (EAU) guidelines for diagnosis, therapy and follow-up of bladder cancer patients were established. Criteria for recommendations were evidence based, and included aspects of cost-effectiveness and clinical feasibility. METHOD: A systematic literature research using Medline Services was conducted. References were weighted by a panel of experts. RESULTS: TNM 1997 classification and WHO grading 1998 are recommended. Recommendations are developed for diagnosis for bladder cancer in general, treatment of superficial and infiltrative bladder cancer, and follow-up after different types of treatment modalities, such as intravesical instillations, radical cystectomy, urinary diversions, radiotherapy and chemotherapy.