Importance of time length to achieving clinical remission on disease activity control, daily activities (ADL) and quality of life (QOL) maintenance after the remission was investigated for patients with rheumatoid arthritis (RA).In patients who achieved remission once or more, relationship between time length from initiation to achieve remission (TL) and patients’ background data at baseline, and relationship between TL and mean simplified disease activity score (SDAI), modified Health Assessment Questionnaire Disability Index (HAQ-DI) score, pain score with visual analog scale (PS-VAS), Sharp/van der Heijde Score (SHS) and quality of life score (QOLS) at the first remission and thereafter were evaluated statistically. Patients were divided into two groups whether TL was within 6 months or longer (G≤6 and G>6). Change of the parameters and Boolean remission rate (BRR) after the first remission between the two groups were compared statistically.In 465 patients, TL correlated significantly with the SDAI score, the HAQ score, PS-VAS, SHS, and the QOLS after the remission. The SDAI score and the BRR after the first remission were significantly better in the G≤6 than in the G>6.TL is an important key to guarantee good disease activity control, ADL and QOL.